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2016-12-2800-readme.txt: add lkml/rt-list post textHEADv4.9-rtmasterPaul Gortmaker1-0/+271
2016-12-284.9-rt: add script to auto create bisect branchesPaul Gortmaker1-0/+157
Sample usage: mkdir rt-test cd rt-test # clone mainline or clone from a local copy with >=4.9 tags in it. git clone /path/to/my/existing/mainline/linux linux-rt-bisect git clone git://git.kernel.org/pub/scm/linux/kernel/git/paulg/4.9-rt-patches.git cd linux-rt-bisect ../4.9-rt-patches.git/scripts/create-branches.sh
2016-12-26no-op: cosmetic line number sync with upstream v4.9-rt1 patchesPaul Gortmaker116-354/+354
Executive summary: nothing to see here. A re-export of all the patches by upstream means they have a refresh of the line numbers that we won't have here. The source tree generated before and after the line number refresh of the patches is the same -- as "git am" doesn't care at all about linear offsets by default. But a sync means we don't have to see all the line number delta chatter in a "git diff" of the patch repository vs. upstream.
2016-12-26localversion: now src equiv. so rt0 --> rt1rt-v4.9-rt1rt-v4.9Paul Gortmaker1-1/+1
2016-12-26Revert "rtmutex: unrefresh for 4.8.15 --> 4.8.0"Paul Gortmaker1-29/+19
This reverts commit bf7ea5b9a8b167ef3f3fc8359333e6c7b117dd18.
2016-12-26mm: replace interim workingset with import for ctxt refreshrt-v4.9-rc8Paul Gortmaker1-27/+14
2016-12-26Revert "softirq-split: temporary "un-refresh" ; trivial ctxt change"rt-v4.9-rc7rt-v4.9-rc6rt-v4.9-rc5rt-v4.9-rc4rt-v4.9-rc3Paul Gortmaker1-14/+8
This reverts commit 7edf5bac7d57a8440e7df5510b2ae4f827bf5b87.
2016-12-26hotplug: import refresh with lockdep update (x2)rt-v4.9-rc2Paul Gortmaker2-35/+26
2016-12-26rwsem: import new patch for rc2+Paul Gortmaker2-0/+219
2016-12-26Revert "x86: temp backport; make thread_info arch specific again"Paul Gortmaker2-92/+0
This reverts commit 89970dc5aed91bca6c41e9aa43cad7645cf37ddc. As of -rc2 the commit is present in mainline so the backport is no longer needed for x86-rt.
2016-12-26rt: import patches new for v4.9-rtrt-v4.9-rc1Paul Gortmaker7-0/+260
2016-12-26hwlat: drop related patchesPaul Gortmaker6-1779/+0
2016-12-26mm: drop pgalloc local lock patch now upstreamrt-v4.8-15054-g9ffc66941df2Paul Gortmaker2-28/+0
2016-12-26rcu: import refresh for __latent_entropy annotationsPaul Gortmaker1-6/+6
2016-12-26random: import refresh for __latent_entropy annotationsPaul Gortmaker1-6/+6
2016-12-26tasklet: import refresh for __latent_entropy annotationsPaul Gortmaker1-10/+10
2016-12-26i915: import refreshed local_unlock for header ctxt changesrt-v4.8-14088-g6b25e21fa6f2Paul Gortmaker1-10/+10
2016-12-26dm: import refresh with fcn rename in ctxtrt-v4.8-12632-ga379f71a30ddPaul Gortmaker1-2/+2
2016-12-26relay: drop timer madness fixPaul Gortmaker2-55/+0
2016-12-26ipc: drop lockless pipelined wakeups patchPaul Gortmaker2-230/+0
2016-12-26blk-mq: drop revert-raw-locks patchrt-v4.8-11417-g24532f768121Paul Gortmaker2-84/+0
2016-12-26blk-mq: overwrite intermediary with refresh import (ctxt/whitespace)rt-v4.8-11412-g12e3d3cdd975Paul Gortmaker1-24/+12
2016-12-26sched-mmdrop-delayed: import refresh for ctxt changesrt-v4.8-11288-gb66484cd7470Paul Gortmaker1-8/+8
2016-12-26workqueue: import refresh with rcu_read_lock conversion squishedrt-v4.8-10067-g513a4befae06Paul Gortmaker3-65/+17
2016-12-26blk-mq.h: intermediary refresh for ctxt and whitespacePaul Gortmaker1-14/+27
2016-12-26block: mq import updated preempt-disable patchPaul Gortmaker1-5/+5
2016-12-26latency-hist: import trivial Kconfig ctxt refreshrt-v4.8-9031-g95107b30be68Paul Gortmaker1-8/+8
2016-12-25lockdep: drop quiet gcc builtin_return patchrt-v4.8-8856-g14986a34e128Paul Gortmaker2-111/+0
2016-12-25net: import trivial header ctxt refreshrt-v4.8-4177-g687ee0ad4e89Paul Gortmaker1-1/+2
2016-12-25qdisc: seqcount: refresh for struct qdisc_skb_headPaul Gortmaker1-9/+9
2016-12-25skbufhead: import rawlock 2 --> 1 patch merge and updatesPaul Gortmaker3-52/+58
2016-12-25mm: workingset trivial ctxt refresh for interim patchPaul Gortmaker1-5/+5
2016-12-25raid5: import refreshed patch with cpu_hp awarenessrt-v4.8-918-g597f03f9d133Paul Gortmaker1-8/+16
2016-12-25softirq-split: temporary "un-refresh" ; trivial ctxt changePaul Gortmaker1-8/+14
2016-12-25softirq-split: import updated patch w/ cpu_hp aware changesPaul Gortmaker1-14/+14
2016-12-25softirq-preempt: import refresh for whitespace indent changePaul Gortmaker1-24/+24
2016-12-25softirq: import split-lock to avoid flags decl. warningrt-v4.8-869-g999dcbe2414ePaul Gortmaker1-22/+35
2016-12-25signal-rt-fix: trivial context refreshrt-v4.8-773-g8e4ef6386703Paul Gortmaker1-5/+5
2016-12-25UV: import trivial refresh for whitespace shufflert-v4.8-759-ga6c4e4cd4464Paul Gortmaker1-12/+12
2016-12-25x86: import updated preempt lazy support patchrt-v4.8-728-g1a4a2bc46072Paul Gortmaker1-27/+33
2016-12-25x86: temp backport; make thread_info arch specific againPaul Gortmaker2-0/+92
With the advantage of hindsight, we know this upstream pseudo revert commit is pending, and can just add it in early and save mucking about with the x86 preempt lazy patches.
2016-12-25x86: drop dumpstack ; removed in mainline c8fe4609827aedc9Paul Gortmaker2-78/+0
2016-12-25sched: mutex wakeup - import trivial whitespace refreshPaul Gortmaker1-8/+8
2016-12-25migrate_disable: import refresh over interim updatePaul Gortmaker1-37/+19
2016-12-25cpu: interim refresh for cpu_hotplug.wq init change upstreamrt-v4.8-627-gaf79ad2b1f33Paul Gortmaker1-17/+24
2016-12-25sched: import refresh worker acct patch for schedstat upstreamPaul Gortmaker1-8/+8
2016-12-25migrate_disable: interim refresh for PN_SCHEDSTATPaul Gortmaker1-20/+38
2016-12-25mce: hrtimer: import trivial header refresh (x2)rt-v4.8-558-ge606d81d2d95Paul Gortmaker2-16/+16
2016-12-25lglocks: drop patches ; core support gone upstreamrt-v4.8-373-g00bcf5cdd6c0Paul Gortmaker5-400/+0
2016-12-25stop-machine: import refresh w/ lglock chunk gone; needs revisitPaul Gortmaker1-13/+30
2016-12-25rcu: import basic refresh (x2)rt-v4.8-304-g4b978934a440Paul Gortmaker2-18/+18
2016-12-25arm64: import refreshed preempt lazy patchrt-v4.8-101-g7af8a0f80888Paul Gortmaker1-18/+23
2016-12-25localversion: reset counter to zeroPaul Gortmaker1-1/+1
2016-12-25rtmutex: unrefresh for 4.8.15 --> 4.8.0rt-v4.8.0Paul Gortmaker1-19/+29
2016-12-25mm: unrefresh for 4.8.15 --> 4.8.0Paul Gortmaker1-14/+27
2016-12-23[ANNOUNCE] v4.8.15-rt10v4.8.15-rt10-patcheslinux-4.8.y-rt-patchesSebastian Andrzej Siewior9-178/+10
Dear RT folks! I'm pleased to announce the v4.8.15-rt10 patch set. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8.15-rt10 The RT patch against v4.8.15 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patch-4.8.15-rt10.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patches-4.8.15-rt10.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-12-12[ANNOUNCE] v4.8.14-rt9Sebastian Andrzej Siewior9-7/+164
Dear RT folks! I'm pleased to announce the v4.8.14-rt9 patch set. Changes since v4.8.14-rt8: - If network interface is removed we move all skbs which are active to a list and free it later. The hunk where the list was cleaned up was lost and is back. - bnx2x and a few others could corrupt their ->poll_list. Patch by Steven Rostedt. - A missing RCU section in the workqueue code could lead to a "use after free" condition if the worqueue was removed. Reported by John Keeping Known issues - CPU hotplug got a little better but can deadlock. The delta patch against v4.8.14-rt9 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/incr/patch-4.8.14-rt8-rt9.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8.14-rt9 The RT patch against v4.8.14 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patch-4.8.14-rt9.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patches-4.8.14-rt9.tar.xz Sebastian diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -395,7 +395,19 @@ typedef enum rx_handler_result rx_handler_result_t; typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); void __napi_schedule(struct napi_struct *n); + +/* + * When PREEMPT_RT_FULL is defined, all device interrupt handlers + * run as threads, and they can also be preempted (without PREEMPT_RT + * interrupt threads can not be preempted). Which means that calling + * __napi_schedule_irqoff() from an interrupt handler can be preempted + * and can corrupt the napi->poll_list. + */ +#ifdef CONFIG_PREEMPT_RT_FULL +#define __napi_schedule_irqoff(n) __napi_schedule(n) +#else void __napi_schedule_irqoff(struct napi_struct *n); +#endif static inline bool napi_disable_pending(struct napi_struct *n) { diff --git a/kernel/workqueue.c b/kernel/workqueue.c --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -1127,9 +1127,11 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq) * As both pwqs and pools are RCU protected, the * following lock operations are safe. */ + rcu_read_lock(); local_spin_lock_irq(pendingb_lock, &pwq->pool->lock); put_pwq(pwq); local_spin_unlock_irq(pendingb_lock, &pwq->pool->lock); + rcu_read_unlock(); } } diff --git a/localversion-rt b/localversion-rt --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt8 +-rt9 diff --git a/net/core/dev.c b/net/core/dev.c --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4912,6 +4912,7 @@ void __napi_schedule(struct napi_struct *n) } EXPORT_SYMBOL(__napi_schedule); +#ifndef CONFIG_PREEMPT_RT_FULL /** * __napi_schedule_irqoff - schedule for receive * @n: entry to schedule @@ -4923,6 +4924,7 @@ void __napi_schedule_irqoff(struct napi_struct *n) ____napi_schedule(this_cpu_ptr(&softnet_data), n); } EXPORT_SYMBOL(__napi_schedule_irqoff); +#endif void __napi_complete(struct napi_struct *n) { @@ -5212,13 +5214,21 @@ static void net_rx_action(struct softirq_action *h) struct softnet_data *sd = this_cpu_ptr(&softnet_data); unsigned long time_limit = jiffies + 2; int budget = netdev_budget; + struct sk_buff_head tofree_q; + struct sk_buff *skb; LIST_HEAD(list); LIST_HEAD(repoll); + __skb_queue_head_init(&tofree_q); + local_irq_disable(); + skb_queue_splice_init(&sd->tofree_queue, &tofree_q); list_splice_init(&sd->poll_list, &list); local_irq_enable(); + while ((skb = __skb_dequeue(&tofree_q))) + kfree_skb(skb); + for (;;) { struct napi_struct *n; Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-12-12[ANNOUNCE] v4.8.14-rt8Sebastian Andrzej Siewior40-132/+122
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-12-01[ANNOUNCE] v4.8.11-rt7Sebastian Andrzej Siewior12-52/+356
Dear RT folks! I'm pleased to announce the v4.8.11-rt7 patch set. Changes since v4.8.11-rt6: - A fix for a race in the futex/rtmutex code which was there since the very beginning. Reported by David Daney, fixed Thomas Gleixner - A fix for the kprobe code on ARM by Yang Shi. - It is no longer possible to force an expedited RCU grace period on -RT. We had one spot in the network where it was disabled on RT due to high latencies it caused. Suggested by Luiz Capitulino and patched by Julia Cartwright. - Expedited RCU grace periods are now forced during boot which should speed the boot process (even on -RT). Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.8.11-rt6 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/incr/patch-4.8.11-rt6-rt7.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8.11-rt7 The RT patch against 4.8.11 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patch-4.8.11-rt7.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patches-4.8.11-rt7.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-12-01[ANNOUNCE] v4.8.11-rt6Sebastian Andrzej Siewior3-38/+1
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-10-31[ANNOUNCE] 4.8.6-rt5Sebastian Andrzej Siewior3-40/+43
Dear RT folks! I'm pleased to announce the v4.8.6-rt5 patch set. Changes since v4.8.6-rt5: - Added `-no-PIE' to the Makefile for AFLAGS as well. This breaks gcc 3.2. Is someone here still using it? - The NFS fixup was slightly adjusted to avoid disabling preemption on !RT. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.8.6-rt5 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/incr/patch-4.8.6-rt4-rt5.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8.6-rt5 The RT patch against 4.8.6 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patch-4.8.6-rt5.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patches-4.8.6-rt5.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-10-31[ANNOUNCE] 4.8.6-rt4Sebastian Andrzej Siewior14-314/+22
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-10-24[ANNOUNCE] 4.8.2-rt3Sebastian Andrzej Siewior17-50/+583
Dear RT folks! I'm pleased to announce the v4.8.2-rt3 patch set. Changes since v4.8.2-rt2: - The connector subsystem could sleep in invalid context. Found and fixed by Mike Galbraith - zram / zcomp has shown new warnings. The warnings have been addressed and an old error fixed (Mike Galbraith) - The ftrace header was off slightly and the ascii arrow were point to the wrong direction (Mike Galbraith) - On CPU-down (CPU hotplug) we could attemp to sleep in wrong context. (Mike Galbraith) - Removed an unused static variable in RXPRC (noticed by kbuild test robot) - ifdefed a variable in APIC so we don't get this "unused variable" warning on certain configurations (noticed by kbuild test robot) - Added `-no-PIE' to the Makefile. This breaks gcc 3.2. Is someone here still using it? - Fixed docbook in two places (noticed by kbuild test robot) - Fixed compile on sparc which was broken after I moved RCU headers (noticed by kbuild test robot) - The kbuild test robot sent me a warning about sleeping in invalid context in the NFS4 code. I didn't manage to reproduce this myself but the warning is valid. I attempted to fix this and will wait for robot's feedback :) - Lazy preempt was broken on x86-32. Fixed by Paul Gortmaker. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.8.2-rt3 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/incr/patch-4.8.2-rt2-rt3.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8.2-rt3 The RT patch against 4.6.5 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patch-4.8.2-rt3.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/patches-4.8.2-rt3.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-10-17[ANNOUNCE] 4.8.2-rt2Sebastian Andrzej Siewior4-51/+2
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-10-06[ANNOUNCE] 4.8-rt1Sebastian Andrzej Siewior246-6523/+3259
Dear RT folks! I'm pleased to announce the v4.8-rt1 patch set. Changes since v4.6.7-rt14: - rebased to v4.8 Known issues - CPU hotplug got a little better but can deadlock. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.8-rt1 The RT patch against 4.8 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/older/patch-4.8-rt1.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.8/older/patches-4.8-rt1.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-09-30[ANNOUNCE] 4.6.7-rt14Sebastian Andrzej Siewior4-5/+167
Dear RT folks! I'm pleased to announce the v4.6.7-rt14 patch set. Changes since v4.6.7-rt13: - It is possible that a task which got priority boosted, de-boosted itself too early in the unlock path. This leads to then priority inversion because the waiter with priority waits while a process with lower priority runs. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.7-rt12 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.7-rt13-rt14.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.7-rt14 The RT patch against 4.6.7 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.7-rt14.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.7-rt14.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-09-15[ANNOUNCE] 4.6.7-rt13Sebastian Andrzej Siewior6-18/+171
Dear RT folks! I'm pleased to announce the v4.6.7-rt13 patch set. Changes since v4.6.7-rt12: - The dcache regression fix up introduced another problem. As pointed out by Thomas Gleixner we can't avoid cpu_chill() for !RT tasks because the owner might be preempted and we would spin until our time slice is used up. Therefore the sched class is ignored and we "chill" if the lock is taken and cond_resched() did not work. - Never gcc make some noise if __builtin_return_address(x) with x > 1 is used. Warning can be ignored by a config option (Steven Rostedt) - might_resched() on x86 with lazy preempt might ignores the preemption counter. Now no more. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.7-rt12 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.7-rt12-rt13.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.7-rt13 The RT patch against 4.6.5 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.7-rt13.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.7-rt13.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-09-08[ANNOUNCE] 4.6.7-rt12Sebastian Andrzej Siewior6-3/+237
Dear RT folks! I'm pleased to announce the v4.6.7-rt12 patch set. Changes since v4.6.7-rt11: - The update to v4.6.7-rt11 introduced a performance regression especially visible when compiling a kernel on /dev/shm. It is fixed by invoking less often the "chill" function. Reported by Joakim Hernberg. - We had a fix in v3.12.8-rt11 for ip_send_unicast_reply() which I dropped in v3.18.8 based -RT due code change and I assumed the need for extra serialization is no longer required. As it turns out it is still required :) - While looking around a similar serialisation might be required in icmp_sk(). No crash has been observed, this is just precaution. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.7-rt11 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.7-rt11-rt12.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.7-rt12 The RT patch against 4.6.5 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.7-rt12.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.7-rt12.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-08-22[ANNOUNCE] 4.6.7-rt11Sebastian Andrzej Siewior19-89/+96
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-08-05[ANNOUNCE] 4.6.5-rt10Sebastian Andrzej Siewior4-1/+97
Dear RT folks! I'm pleased to announce the v4.6.5-rt10 patch set. Changes since v4.6.5-rt9: - Added missing cpu_light_get() in the scsi fcoe driver. Patch by Mike Galbraith. - Under a special a condition (a preempted TLB flush in do_exit()) it was possible on x86-UP to enter endless pagefaults. The pagefaults stopped after a context switch. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.5-rt9 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.5-rt9-rt10.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.5-rt10 The RT patch against 4.6.5 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.5-rt10.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.5-rt10.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-07-29[ANNOUNCE] 4.6.5-rt9Sebastian Andrzej Siewior11-32/+32
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-07-15[ANNOUNCE] 4.6.4-rt8Sebastian Andrzej Siewior42-294/+3731
Dear RT folks! I'm pleased to announce the v4.6.4-rt8 patch set. Changes since v4.6.4-rt8: - Import Thomas' timer rework known as "timer: Refactor the timer wheel" patch set which made its way into the -TIP tree. With this changes we get NOHZ_FULL working. Finally. - Avoid warning of an unused symbol in the !RT case (preemptible_lazy()) - Replace the "trace event preempt count" fixup with Steven's version. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.4-rt8 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.4-rt7-rt8.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.4-rt8 The RT patch against 4.6.4 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.4-rt8.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.4-rt8.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-07-14[ANNOUNCE] 4.6.4-rt7Sebastian Andrzej Siewior4-1/+59
Dear RT folks! I'm pleased to announce the v4.6.4-rt7 patch set. Changes since v4.6.4-rt6: - Wake up all waiters of del_timer_sync(). Usually there should not be more than just one waiter (per timer base) but it possible to gain more. - Wake up the waiers of del_timer_sync() after dropping the base lock. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.4-rt6 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.4-rt6-rt7.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.4-rt7 The RT patch against 4.6.2 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.4-rt7.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.4-rt7.tar.xz Sebastian
2016-07-12[ANNOUNCE] 4.6.4-rt6Sebastian Andrzej Siewior18-39/+39
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-06-10[ANNOUNCE] 4.6.2-rt5Sebastian Andrzej Siewior9-16/+44
Dear RT folks! I'm pleased to announce the v4.6.2-rt5 patch set. Changes since v4.6.2-rt4: - "Schedule while atomic" fixup in cgroup / memcontrol. Patch by Mike Galbraith. - Rename of "work-simple" to "swork" to align with "swait". Patch by Mike Galbraith. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.2-rt4 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.2-rt4-rt5.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.2-rt5 The RT patch against 4.6.2 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.2-rt5.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.2-rt5.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-06-10[ANNOUNCE] 4.6.2-rt4Sebastian Andrzej Siewior1-1/+1
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-06-03[ANNOUNCE] 4.6.1-rt3Sebastian Andrzej Siewior10-2/+339
Dear RT folks! I'm pleased to announce the v4.6.1-rt3 patch set. Changes since v4.6.1-rt2: - On return from interrupt on ARM we could schedule with lazy preempt count > 0 under some circumstances. It isn't toxic but it shouldn't happen. Noticed by Thomas Gleixner. - The way the preempt counter is accessed on non-x86 architectures allowed the compiler to reorder the code slightly. This led to decrementing the preempt counter, checking for the need resched bit followed by writing the counter back. An interrupt between the last two steps will lead to a missing preemption point and thus high latencies. Patch by Peter Zijlstra. - The recorded preemption counter in event trace points (such as raw_syscall_entry) are off by one because each trace point increments the counter. This has been corrected. - It is now ensured that there are no attempts to print from IRQ or NMI context. On certain events such as hard-lockup-detector we would attempt to grab sleeping locks. - Allow lru_add_drain_all() to perform its work remotely. Patch by Luiz Capitulino and Rik van Riel. Known issues - CPU hotplug got a little better but can deadlock. The delta patch against 4.6.1-rt2 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/incr/patch-4.6.1-rt2-rt3.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6.1-rt3 The RT patch against 4.6.1 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.1-rt3.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6.1-rt3.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-06-02[ANNOUNCE] 4.6.1-rt2Sebastian Andrzej Siewior9-27/+27
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-05-13[ANNOUNCE] 4.6-rc7-rt1Sebastian Andrzej Siewior220-10567/+1229
Dear RT folks! I'm pleased to announce the v4.6-rc7-rt1 patch set. I tested it on my AMD A10, 64bit. Had a few runs on ARM, nothing exploded so far. Changes since v4.4.9-rt17: - rebase to v4.6-rc7 - RWLOCKS and SPINLOCKS used to be cacheline aligned on RT. Now there are no more which is the same behaviour as in upstream. Known issues (inherited from v4.4-RT): - CPU hotplug got a little better but can deadlock. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.6-rc7-rt1 The RT patch against 4.6-rc7 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6-rc7-rt1.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.6/patches-4.6-rc7-rt1.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-05-06[ANNOUNCE] 4.4.9-rt17Sebastian Andrzej Siewior21-167/+73
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-04-15[ANNOUNCE] 4.4.7-rt16Sebastian Andrzej Siewior43-178/+840
Dear RT folks! I'm pleased to announce the v4.4.7-rt16 patch set. Changes since v4.4.7-rt15: - picked a few panic() re-entrance from NMI fixes from upstream. On -RT we have the same problem without NMI but with the soft/hard watchdog triggering panic(). - Don't take the port->lock on oops_in_progress. We had a trylock but that trylock does not work if invoked with IRQs off (like from the panic() caller). I am not very happy about this but if we keep it that way it would make sense to make a similar change for the other UART drivers… - Rik van Riel and Clark Williams pointed out that a change made by Frederic Weisbecker in v4.5 could be backported and then we could remove some locking around vtime handling. Known issues: - CPU hotplug got a little better but can deadlock. The delta patch against 4.4.7-rt15 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.7-rt15-rt16.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.7-rt16 The RT patch against 4.4.7 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.7-rt16.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.7-rt16.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-04-15[ANNOUNCE] 4.4.7-rt15Sebastian Andrzej Siewior1-2/+2
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-04-08[ANNOUNCE] 4.4.6-rt14Sebastian Andrzej Siewior4-3/+39
Dear RT folks! I'm pleased to announce the v4.4.6-rt14 patch set. Changes since v4.4.6-rt13: - Dan Murphy reported that zram does not compile on !RT. Now it does. - The TWD timer is now enabled on IMX6Q configs even with !SMP. People with i.MX6SOLO should now see better cyclictest results with TWD than with the mxc-timer. Known issues: - CPU hotplug got a little better but can deadlock. The delta patch against 4.4.6-rt13 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.6-rt13-rt14.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.6-rt14 The RT patch against 4.4.6 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.6-rt14.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.6-rt14.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-04-01[ANNOUNCE] 4.4.6-rt13Sebastian Andrzej Siewior13-66/+1039
Dear RT folks! I'm pleased to announce the v4.4.6-rt13 patch set. Changes since v4.4.6-rt12: - Alexandre Belloni sent patch for the AT91 to get rid of the free_irq() warning. - Yang Shi sent a patch to address a "sleeping while atomic" warning in a writeback tracepoint. Until now it was disabled to avoid it, now it can be used again. - Rik van Riel sent a patch to make the kvm async pagefault code use a simple wait queue. - Mike Galbraith set a patch to address a "sleeping while atomic" warning in zsmalloc - Netork packets sent by a RT task could be delayed (but won't block the RT task) if a task with lower priority was interruped while sending a packet. This is address by taking a qdisc lock so the high-prio task can boost a task with lower priority. - Clark Williams reported a swait related complate_all() warning while comming out of suspend. Suspend to RAM (and hibernate) are now filtered out from the warning. - Mike Galbraith sent a patch to address a "sleeping while atomic" warning in the zram driver. - Josh Cartwright sent a patch to fix a lockdep splat in list_bl which was reported by Luis Claudio R. Goncalves. Known issues: - CPU hotplug got a little better but can deadlock. The delta patch against 4.4.6-rt12 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.6-rt12-rt13.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.6-rt13 The RT patch against 4.4.6 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.6-rt13.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.6-rt13.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-03-29[ANNOUNCE] 4.4.6-rt12Sebastian Andrzej Siewior7-13/+13
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-03-09[ANNOUNCE] 4.4.4-rt11Sebastian Andrzej Siewior36-691/+6578
Dear RT folks! I'm pleased to announce the v4.4.4-rt11 patch set. Changes since v4.4.4-rt10: - A compile error has been fixed in conjunction with the latency tracer. - AT91 got a little better. A larger patch series by Boris Brezillon has been merged. That means SAMA5 boots now. There is one warning left about invoking free_irq() twice. I would be glad about some feedback from pre-SAMA5 SoC. Those which share UART and timer interrupt. It seems that that one I have here does not do this anymore. - A patch on top the AT91 series to avoid two warning while switching from period to oneshow mode. - Daniel Wagner refurbished the swait patches. This relase contains now what is queued for v4.6 in the TIP tree. Only RT uses `completion' based on swait. Based on the current implementation you will see a warning if complete_all() in invoked on more than two waiters. Please report if see this. Known issues: - CPU hotplug got a little better but can deadlock. The delta patch against 4.4.4-rt10 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.4-rt10-rt11.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.4-rt11 The RT patch against 4.4.4 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.4-rt11.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.4-rt11.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-03-09[ANNOUNCE] 4.4.4-rt10Sebastian Andrzej Siewior48-181/+144
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-02-29[ANNOUNCE] v4.4.3-rt9Thomas Gleixner14-6/+726
Dear RT folks! I'm pleased to announce the v4.4.3-rt9 patch set. v4.4.2-rt7 and v4.4.3-rt8 are non-announced updates to incorporate the linux-4.4.y stable tree. There is one change caused by the 4.4.3 update: The relaxed handling of dump_stack() on RT has been dropped as there is actually a potential deadlock lurking around the corner. See: commit d7ce36924344 upstream. This does not effect the other facilities which gather stack traces. RT changes since v4.4.3-rt8: Clark Williams (1): rcu/torture: Comment out rcu_bh ops on PREEMPT_RT_FULL Josh Cartwright (1): sc16is7xx: Drop bogus use of IRQF_ONESHOT Mike Galbraith (4): sched,rt: __always_inline preemptible_lazy() locking/lglocks: Use preempt_enable/disable_nort() in lg_double_[un]lock drm,radeon,i915: Use preempt_disable/enable_rt() where recommended drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end() Sebastian Andrzej Siewior (1): kernel: sched: Fix preempt_disable_ip recording for preempt_disable() Thomas Gleixner (4): iommu/amd: Use WARN_ON_NORT in __attach_device() tick/broadcast: Make broadcast hrtimer irqsafe trace/writeback: Block cgroup path tracing on RT v4.4.3-rt9 Yang Shi (2): trace: Use rcuidle version for preemptoff_hist trace point f2fs: Mutex can't be used by down_write_nest_lock() Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.4.3-rt8 is appended below and can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.3-rt8-rt9.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.3-rt9 The RT patch against 4.4.3 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.3-rt9.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.3-rt9.tar.xz Enjoy! tglx Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-02-28[ANNOUNCE] 4.4.3-rt8Thomas Gleixner3-25/+9
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-02-25[ANNOUNCE] 4.4.2-rt7Sebastian Andrzej Siewior11-62/+53
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-02-13[ANNOUNCE] 4.4.1-rt6Sebastian Andrzej Siewior28-114/+1601
Dear RT folks! I'm pleased to announce the v4.4.1-rt6 patch set. Changes since v4.4.1-rt5: - The rtmutex wait_lock is taken with interrupts disabled again. It fixes a possible deadlock in the posix timer code. Patch by Thomas Gleixner. - Don't disable interrupts around atomic_dec_and_lock() in wb_congested_put() - use a RCU lock in call_step_hook() on ARM64 to avoid sleeping while atomic issue. Patch by Yang Shi. - In migrate_disable() we use now the fast / atomic path if were are called with interrupts disabled. This avoids a recursion with lockdep in some cases. - The migrate_disable()/_enable() invocation has been moved from the locking macro into the used rt_mutex functions. This makes the kernel a tiny bit smaller. - We now try to invoke migrate_enable() before we schedule() out while waiting for a lock. This optimization should allow the scheduler to put the task on another CPU once it became runnable and the original CPU is busy. This does not work for nested locks. Patch by Thomas Gleixner. - The stop_machine.c was converted to use raw_locks. This patch has been identified to cause problems during hotplug and was reverted. - There is a useless rcu_bh thread which has been deactivated. - Manish Jaggi reported that a sleeping while atomic issue on AMR64 with KVM. Josh Cartwright sent a patch. Known issues: - bcache stays disabled - CPU hotplug got a little better but can deadlock. - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information. Since Clark can not reproduce it anymore and hasn't seen it, it will be removed from this list and moved to the bugzilla. The delta patch against 4.4.1-rt5 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.1-rt5-rt6.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.1-rt6 The RT patch against 4.4.1 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.1-rt6.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.5-rt6.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-02-04[ANNOUNCE] 4.4.1-rt5Sebastian Andrzej Siewior21-76/+215
Dear RT folks! I'm pleased to announce the v4.4.1-rt5 patch set. Changes since v4.4.1-rt4: - various compile fixes found by kbuild test robot. - Mike Galbraith spotted that migrate_disables() sets ->nr_cpus_allowed to one by accident. - Christoph Mathys reported that the "preemptirqsoff_hist" tracer reboots the system once enabled. The problem has been resolved. - Thomas Gleixner sent a patch to set a default affinity for mask for interrupts via kernel command line. - Yang Shi reported that some perf events were reported as "not counted" instead the actual numbers. The problem has been resolved. Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.4.1-rt4 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4.1-rt4-rt5.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4.1-rt5 The RT patch against 4.4.1 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4.1-rt5.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4.1-rt5.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-02-01[ANNOUNCE] 4.4.1-rt4Sebastian Andrzej Siewior27-48/+48
Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-01-22[ANNOUNCE] 4.4-rt3Sebastian Andrzej Siewior54-489/+1433
Dear RT folks! I'm pleased to announce the v4.4-rt3 patch set. Changes since v4.4-rt2: - various compile fixes found by kbuild test robot and Grygorii Strashko. - kbuild test robot reported that we open interrupts too early in ptrace_freeze_traced(). - dropping a GPIO patch from the OMAP queue which is no longer required (requested by Grygorii Strashko) - dropping a retry loop in the mm/anon_vma_free() which was probably just duct tape and does no longer seems required. - Various people pointed out that the AT91 clocksource driver did not not compile. It does now. However AT91 does not yet boot. There are two issues: - the free_irq() from irq-off region is not good and triggers a warning because it is invoked twice. This will be addressed later, the current patch is not bulletproof and not yet part of the series. - The PMC driver invokes request_irq() very early which leads to a NULL pointer exception (non-RT with threaded interrupts has the same problem). A longer explanation by Alexandre Belloni and his current patch series he refers to can be found at: http://lkml.kernel.org/r/1452997394-8554-1-git-send-email-alexandre.belloni@free-electrons.com - Using a virtual network device (like a bridge) could lead to a "Dead loop" message the packet dropped. This problem has been fixed. - Julia Lawall sent a patch against hwlat_detector to "move constants to the right of binary operators". - Carsten Emde sent a patch to fix the latency histogram tracer. - Mike Galbraith reported that the softirq ate about 25% CPU time doing nothing. The problem was fixed. - Grygorii Strashko pointed out that two RCU/ksoftirqd changes that were made to the non-RT version of the code did not make to the RT version. This was corrected. - btrfs forgot to initialize a seqcount variable which prints a warning if used with lockdep. - A few users napi_alloc_cache() were not protected against reentrance. - Grygorii Strashko fixed highmem on ARM. - Mike Galbraith reported that all tasks run on CPU0 even on a system with more than one. Problem fixed by Thomas Gleixner. - Anders Roxell sent two patches (against coupled and vsp1) because they did not compile and printed a warning on -RT. - Mike Galbraith pointed out that we forgot to check for NEED_RESCHED_LAZY in an exit path on X86 and provided a patch. - Mike Galbraith pointed out that we don't consider the preempt_lazy_count in the common preemption check and provided a patch. With this fixed, the sched_other performance should improve. - A high network load could lead to RCU stalls followed by the OOM killer. Say a slower ARM with on a GBIT link running RT tasks, doing network IO (at a RT prio) and getting shot with the flood ping at a high rate. NAPI does not really kick in because each time NAPI tries defer processing it starts again in the context of the IRQ thread of the network driver. This has been fixed in two steps: - once the NAPI budget is up, we schedule ksoftirqd. This works now on -RT, too - ksoftirqd runs now at SCHED_OTHER priority like the on !RT. Now the scheduler can preempt ksoftirqd and let RCU do its job. The timer and hrtimer softirq processing happens now in ktimersoftd which runs at SCHED_FIFO (as ksoftirqd used to). - Grygorii Strashko pointed out that if RCU_EXPERT is not enabled then we can't select RCU_BOOST. Therefore RCU_EXPERT is default y on RT. - Grygorii Strashko pointed out the we miss to check for NEED_RESCHED_LAZY in an exit path on ARM. This has been fixed on ARM and on ARM64 as well. This was a lot and I hope I forgot nothing important. Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.4-rt2 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/incr/patch-4.4-rt2-rt3.patch You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4-rt3 The RT patch against 4.1.13 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4-rt3.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt3.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2016-01-12[ANNOUNCE] 4.4-rt2Sebastian Andrzej Siewior31-98/+63
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-12-23[ANNOUNCE] 4.4-rc6-rt1Sebastian Andrzej Siewior253-8941/+2767
Please don't continue reading before christmas eve (or morning, depending on your schedule). If you don't celebrate christmas, well go ahead. Dear RT folks! I'm pleased to announce the v4.4-rc6-rt1 patch set. I tested it on my AMD A10, 64bit. Nothing exploded so far, filesystem is still there. I haven't tested it on anything else. Before someone asks: this does not mean it does *not* work on ARM I simply did not try it. If you are brave then download it, install it and have fun. If something breaks, please report it. If your machine starts blinking like a christmas tree while using the patch then *please* send a photo. Changes since v4.1.15-rt17: - rebase to v4.4-rc6 Known issues (inherited from v4.1-RT): - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information - Christoph Mathys reported a stall in cgroup locking code while using Linux containers. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.4-rc6-rt1 The RT patch against 4.4-rc6 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patch-4.4-rc6-rt1.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rc6-rt1.tar.xz Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-12-22[ANNOUNCE] 4.1.15-rt17Sebastian Andrzej Siewior29-68/+1739
Dear RT folks! I'm pleased to announce the v4.1.15-rt17 patch set. Changes since v4.1.15-rt16: Axel Lin (1): gpio: omap: Fix missing raw locks conversion Grygorii Strashko (15): gpio: omap: fix omap_gpio_free to not clean up irq configuration gpio: omap: fix error handling in omap_gpio_irq_type gpio: omap: rework omap_x_irq_shutdown to touch only irqs specific registers gpio: omap: rework omap_gpio_request to touch only gpio specific registers gpio: omap: rework omap_gpio_irq_startup to handle current pin state properly gpio: omap: add missed spin_unlock_irqrestore in omap_gpio_irq_type gpio: omap: prevent module from being unloaded while in use gpio: omap: remove wrong irq_domain_remove usage in probe gpio: omap: switch to use platform_get_irq gpio: omap: fix omap2_set_gpio_debounce gpio: omap: protect regs access in omap_gpio_irq_handler gpio: omap: fix clk_prepare/unprepare usage gpio: omap: fix static checker warning gpio: omap: move pm runtime in irq_chip.irq_bus_lock/sync_unlock gpio: omap: convert to use generic irq handler Russ Dill (1): ARM: OMAP2: Drop the concept of certain power domains not being able to lose context. Sebastian Andrzej Siewior (4): Revert "x86: Do not disable preemption in int3 on 32bit" Revert "gpio: omap: use raw locks for locking" gpio: omap: use raw locks for locking v4.1.15-rt17 Tony Lindgren (3): gpio: omap: Allow building as a loadable module gpio: omap: Fix gpiochip_add() handling for deferred probe gpio: omap: Fix GPIO numbering for deferred probe Yang Shi (1): x86/signal: delay calling signals on 32bit bmouring@ni.com (1): rtmutex: Use chainwalking control enum Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information - Christoph Mathys reported a stall in cgroup locking code while using Linux containers. The delta patch against 4.1.15-rt17 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.15-rt16-rt17.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.15-rt17 The RT patch against 4.1.15 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.15-rt17.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.15-rt17.tar.xz Sebastian diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c index 7a577145b68b..689a1af47c80 100644 --- a/arch/arm/mach-omap2/gpio.c +++ b/arch/arm/mach-omap2/gpio.c @@ -130,7 +130,6 @@ static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) } pwrdm = omap_hwmod_get_pwrdm(oh); - pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm); pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata)); kfree(pdata); diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 78af6d8cf2e2..ef4227ffa3b6 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -1166,43 +1166,3 @@ int pwrdm_get_context_loss_count(struct powerdomain *pwrdm) return count; } -/** - * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? - * @pwrdm: struct powerdomain * - * - * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain - * can lose either memory or logic context or if @pwrdm is invalid, or - * returns 0 otherwise. This function is not concerned with how the - * powerdomain registers are programmed (i.e., to go off or not); it's - * concerned with whether it's ever possible for this powerdomain to - * go off while some other part of the chip is active. This function - * assumes that every powerdomain can go to either ON or INACTIVE. - */ -bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) -{ - int i; - - if (!pwrdm) { - pr_debug("powerdomain: %s: invalid powerdomain pointer\n", - __func__); - return 1; - } - - if (pwrdm->pwrsts & PWRSTS_OFF) - return 1; - - if (pwrdm->pwrsts & PWRSTS_RET) { - if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) - return 1; - - for (i = 0; i < pwrdm->banks; i++) - if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) - return 1; - } - - for (i = 0; i < pwrdm->banks; i++) - if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) - return 1; - - return 0; -} diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h index 28a796ce07d7..5e0c033a21db 100644 --- a/arch/arm/mach-omap2/powerdomain.h +++ b/arch/arm/mach-omap2/powerdomain.h @@ -244,7 +244,6 @@ int pwrdm_state_switch(struct powerdomain *pwrdm); int pwrdm_pre_transition(struct powerdomain *pwrdm); int pwrdm_post_transition(struct powerdomain *pwrdm); int pwrdm_get_context_loss_count(struct powerdomain *pwrdm); -bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm); extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state); diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h index b1b08a28c72a..0e7bfe98e1d1 100644 --- a/arch/x86/include/asm/signal.h +++ b/arch/x86/include/asm/signal.h @@ -32,7 +32,7 @@ typedef struct { * TIF_NOTIFY_RESUME and set up the signal to be sent on exit of the * trap. */ -#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_X86_64) +#if defined(CONFIG_PREEMPT_RT_FULL) #define ARCH_RT_DELAYS_SIGNAL_SEND #endif diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index ebae118938ef..324ab5247687 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -88,21 +88,9 @@ static inline void conditional_sti(struct pt_regs *regs) local_irq_enable(); } -static inline void conditional_sti_ist(struct pt_regs *regs) +static inline void preempt_conditional_sti(struct pt_regs *regs) { -#ifdef CONFIG_X86_64 - /* - * X86_64 uses a per CPU stack on the IST for certain traps - * like int3. The task can not be preempted when using one - * of these stacks, thus preemption must be disabled, otherwise - * the stack can be corrupted if the task is scheduled out, - * and another task comes in and uses this stack. - * - * On x86_32 the task keeps its own stack and it is OK if the - * task schedules out. - */ preempt_count_inc(); -#endif if (regs->flags & X86_EFLAGS_IF) local_irq_enable(); } @@ -113,13 +101,11 @@ static inline void conditional_cli(struct pt_regs *regs) local_irq_disable(); } -static inline void conditional_cli_ist(struct pt_regs *regs) +static inline void preempt_conditional_cli(struct pt_regs *regs) { if (regs->flags & X86_EFLAGS_IF) local_irq_disable(); -#ifdef CONFIG_X86_64 preempt_count_dec(); -#endif } enum ctx_state ist_enter(struct pt_regs *regs) @@ -550,9 +536,9 @@ dotraplinkage void notrace do_int3(struct pt_regs *regs, long error_code) * as we may switch to the interrupt stack. */ debug_stack_usage_inc(); - conditional_sti_ist(regs); + preempt_conditional_sti(regs); do_trap(X86_TRAP_BP, SIGTRAP, "int3", regs, error_code, NULL); - conditional_cli_ist(regs); + preempt_conditional_cli(regs); debug_stack_usage_dec(); exit: ist_exit(regs, prev_state); @@ -682,12 +668,12 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code) debug_stack_usage_inc(); /* It's safe to allow irq's after DR6 has been saved */ - conditional_sti_ist(regs); + preempt_conditional_sti(regs); if (v8086_mode(regs)) { handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, X86_TRAP_DB); - conditional_cli_ist(regs); + preempt_conditional_cli(regs); debug_stack_usage_dec(); goto exit; } @@ -707,7 +693,7 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code) si_code = get_si_code(tsk->thread.debugreg6); if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS) || user_icebp) send_sigtrap(tsk, regs, error_code, si_code); - conditional_cli_ist(regs); + preempt_conditional_cli(regs); debug_stack_usage_dec(); exit: diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index caefe806db5e..ff7df95de3bf 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -308,7 +308,7 @@ config GPIO_OCTEON family of SOCs. config GPIO_OMAP - bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS + tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST default y if ARCH_OMAP depends on ARM select GENERIC_IRQ_CHIP diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index a0ace2758e2e..4916fd726dce 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -29,6 +29,7 @@ #include <linux/platform_data/gpio-omap.h> #define OFF_MODE 1 +#define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF static LIST_HEAD(omap_gpio_list); @@ -50,7 +51,7 @@ struct gpio_regs { struct gpio_bank { struct list_head node; void __iomem *base; - u16 irq; + int irq; u32 non_wakeup_gpios; u32 enabled_non_wakeup_gpios; struct gpio_regs context; @@ -58,6 +59,7 @@ struct gpio_bank { u32 level_mask; u32 toggle_mask; raw_spinlock_t lock; + raw_spinlock_t wa_lock; struct gpio_chip chip; struct clk *dbck; u32 mod_usage; @@ -67,7 +69,7 @@ struct gpio_bank { struct device *dev; bool is_mpuio; bool dbck_flag; - bool loses_context; + bool context_valid; int stride; u32 width; @@ -175,7 +177,7 @@ static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set static inline void omap_gpio_dbck_enable(struct gpio_bank *bank) { if (bank->dbck_enable_mask && !bank->dbck_enabled) { - clk_prepare_enable(bank->dbck); + clk_enable(bank->dbck); bank->dbck_enabled = true; writel_relaxed(bank->dbck_enable_mask, @@ -193,7 +195,7 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank) */ writel_relaxed(0, bank->base + bank->regs->debounce_en); - clk_disable_unprepare(bank->dbck); + clk_disable(bank->dbck); bank->dbck_enabled = false; } } @@ -204,8 +206,9 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank) * @offset: the gpio number on this @bank * @debounce: debounce time to use * - * OMAP's debounce time is in 31us steps so we need - * to convert and round up to the closest unit. + * OMAP's debounce time is in 31us steps + * <debounce time> = (GPIO_DEBOUNCINGTIME[7:0].DEBOUNCETIME + 1) x 31 + * so we need to convert and round up to the closest unit. */ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset, unsigned debounce) @@ -213,34 +216,33 @@ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset, void __iomem *reg; u32 val; u32 l; + bool enable = !!debounce; if (!bank->dbck_flag) return; - if (debounce < 32) - debounce = 0x01; - else if (debounce > 7936) - debounce = 0xff; - else - debounce = (debounce / 0x1f) - 1; + if (enable) { + debounce = DIV_ROUND_UP(debounce, 31) - 1; + debounce &= OMAP4_GPIO_DEBOUNCINGTIME_MASK; + } l = BIT(offset); - clk_prepare_enable(bank->dbck); + clk_enable(bank->dbck); reg = bank->base + bank->regs->debounce; writel_relaxed(debounce, reg); reg = bank->base + bank->regs->debounce_en; val = readl_relaxed(reg); - if (debounce) + if (enable) val |= l; else val &= ~l; bank->dbck_enable_mask = val; writel_relaxed(val, reg); - clk_disable_unprepare(bank->dbck); + clk_disable(bank->dbck); /* * Enable debounce clock per module. * This call is mandatory because in omap_gpio_request() when @@ -285,7 +287,7 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset) bank->context.debounce = 0; writel_relaxed(bank->context.debounce, bank->base + bank->regs->debounce); - clk_disable_unprepare(bank->dbck); + clk_disable(bank->dbck); bank->dbck_enabled = false; } } @@ -488,9 +490,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) unsigned long flags; unsigned offset = d->hwirq; - if (!BANK_USED(bank)) - pm_runtime_get_sync(bank->dev); - if (type & ~IRQ_TYPE_SENSE_MASK) return -EINVAL; @@ -500,10 +499,15 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) raw_spin_lock_irqsave(&bank->lock, flags); retval = omap_set_gpio_triggering(bank, offset, type); + if (retval) { + raw_spin_unlock_irqrestore(&bank->lock, flags); + goto error; + } omap_gpio_init_irq(bank, offset); if (!omap_gpio_is_input(bank, offset)) { raw_spin_unlock_irqrestore(&bank->lock, flags); - return -EINVAL; + retval = -EINVAL; + goto error; } raw_spin_unlock_irqrestore(&bank->lock, flags); @@ -512,6 +516,9 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) __irq_set_handler_locked(d->irq, handle_edge_irq); + return 0; + +error: return retval; } @@ -638,22 +645,18 @@ static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset, return 0; } -static void omap_reset_gpio(struct gpio_bank *bank, unsigned offset) -{ - omap_set_gpio_direction(bank, offset, 1); - omap_set_gpio_irqenable(bank, offset, 0); - omap_clear_gpio_irqstatus(bank, offset); - omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE); - omap_clear_gpio_debounce(bank, offset); -} - /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */ static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable) { struct gpio_bank *bank = omap_irq_data_get_bank(d); unsigned offset = d->hwirq; + int ret; - return omap_set_gpio_wakeup(bank, offset, enable); + ret = omap_set_gpio_wakeup(bank, offset, enable); + if (!ret) + ret = irq_set_irq_wake(bank->irq, enable); + + return ret; } static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) @@ -669,14 +672,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) pm_runtime_get_sync(bank->dev); raw_spin_lock_irqsave(&bank->lock, flags); - /* Set trigger to none. You need to enable the desired trigger with - * request_irq() or set_irq_type(). Only do this if the IRQ line has - * not already been requested. - */ - if (!LINE_USED(bank->irq_usage, offset)) { - omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE); - omap_enable_gpio_module(bank, offset); - } + omap_enable_gpio_module(bank, offset); bank->mod_usage |= BIT(offset); raw_spin_unlock_irqrestore(&bank->lock, flags); @@ -690,8 +686,11 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) raw_spin_lock_irqsave(&bank->lock, flags); bank->mod_usage &= ~(BIT(offset)); + if (!LINE_USED(bank->irq_usage, offset)) { + omap_set_gpio_direction(bank, offset, 1); + omap_clear_gpio_debounce(bank, offset); + } omap_disable_gpio_module(bank, offset); - omap_reset_gpio(bank, offset); raw_spin_unlock_irqrestore(&bank->lock, flags); /* @@ -711,29 +710,27 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) * line's interrupt handler has been run, we may miss some nested * interrupts. */ -static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) +static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank) { void __iomem *isr_reg = NULL; u32 isr; unsigned int bit; - struct gpio_bank *bank; - int unmasked = 0; - struct irq_chip *irqchip = irq_desc_get_chip(desc); - struct gpio_chip *chip = irq_get_handler_data(irq); + struct gpio_bank *bank = gpiobank; + unsigned long wa_lock_flags; + unsigned long lock_flags; - chained_irq_enter(irqchip, desc); - - bank = container_of(chip, struct gpio_bank, chip); isr_reg = bank->base + bank->regs->irqstatus; - pm_runtime_get_sync(bank->dev); - if (WARN_ON(!isr_reg)) goto exit; + pm_runtime_get_sync(bank->dev); + while (1) { u32 isr_saved, level_mask = 0; u32 enabled; + raw_spin_lock_irqsave(&bank->lock, lock_flags); + enabled = omap_get_gpio_irqbank_mask(bank); isr_saved = isr = readl_relaxed(isr_reg) & enabled; @@ -747,12 +744,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask); omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask); - /* if there is only edge sensitive GPIO pin interrupts - configured, we could unmask GPIO bank interrupt immediately */ - if (!level_mask && !unmasked) { - unmasked = 1; - chained_irq_exit(irqchip, desc); - } + raw_spin_unlock_irqrestore(&bank->lock, lock_flags); if (!isr) break; @@ -761,6 +753,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) bit = __ffs(isr); isr &= ~(BIT(bit)); + raw_spin_lock_irqsave(&bank->lock, lock_flags); /* * Some chips can't respond to both rising and falling * at the same time. If this irq was requested with @@ -771,18 +764,20 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) if (bank->toggle_mask & (BIT(bit))) omap_toggle_gpio_edge_triggering(bank, bit); + raw_spin_unlock_irqrestore(&bank->lock, lock_flags); + + raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags); + generic_handle_irq(irq_find_mapping(bank->chip.irqdomain, bit)); + + raw_spin_unlock_irqrestore(&bank->wa_lock, + wa_lock_flags); } } - /* if bank has any level sensitive GPIO pin interrupt - configured, we must unmask the bank interrupt only after - handler(s) are executed in order to avoid spurious bank - interrupt */ exit: - if (!unmasked) - chained_irq_exit(irqchip, desc); pm_runtime_put(bank->dev); + return IRQ_HANDLED; } static unsigned int omap_gpio_irq_startup(struct irq_data *d) @@ -791,15 +786,22 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d) unsigned long flags; unsigned offset = d->hwirq; - if (!BANK_USED(bank)) - pm_runtime_get_sync(bank->dev); - raw_spin_lock_irqsave(&bank->lock, flags); - omap_gpio_init_irq(bank, offset); + + if (!LINE_USED(bank->mod_usage, offset)) + omap_set_gpio_direction(bank, offset, 1); + else if (!omap_gpio_is_input(bank, offset)) + goto err; + omap_enable_gpio_module(bank, offset); + bank->irq_usage |= BIT(offset); + raw_spin_unlock_irqrestore(&bank->lock, flags); omap_gpio_unmask_irq(d); return 0; +err: + raw_spin_unlock_irqrestore(&bank->lock, flags); + return -EINVAL; } static void omap_gpio_irq_shutdown(struct irq_data *d) @@ -810,9 +812,26 @@ static void omap_gpio_irq_shutdown(struct irq_data *d) raw_spin_lock_irqsave(&bank->lock, flags); bank->irq_usage &= ~(BIT(offset)); + omap_set_gpio_irqenable(bank, offset, 0); + omap_clear_gpio_irqstatus(bank, offset); + omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE); + if (!LINE_USED(bank->mod_usage, offset)) + omap_clear_gpio_debounce(bank, offset); omap_disable_gpio_module(bank, offset); - omap_reset_gpio(bank, offset); raw_spin_unlock_irqrestore(&bank->lock, flags); +} + +static void omap_gpio_irq_bus_lock(struct irq_data *data) +{ + struct gpio_bank *bank = omap_irq_data_get_bank(data); + + if (!BANK_USED(bank)) + pm_runtime_get_sync(bank->dev); +} + +static void gpio_irq_bus_sync_unlock(struct irq_data *data) +{ + struct gpio_bank *bank = omap_irq_data_get_bank(data); /* * If this is the last IRQ to be freed in the bank, @@ -1048,10 +1067,6 @@ static void omap_gpio_mod_init(struct gpio_bank *bank) /* Initialize interface clk ungated, module enabled */ if (bank->regs->ctrl) writel_relaxed(0, base + bank->regs->ctrl); - - bank->dbck = clk_get(bank->dev, "dbclk"); - if (IS_ERR(bank->dbck)) - dev_err(bank->dev, "Could not get gpio dbck\n"); } static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) @@ -1080,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) } else { bank->chip.label = "gpio"; bank->chip.base = gpio; - gpio += bank->width; } bank->chip.ngpio = bank->width; @@ -1090,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) return ret; } + if (!bank->is_mpuio) + gpio += bank->width; + #ifdef CONFIG_ARCH_OMAP1 /* * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop @@ -1112,7 +1129,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) } ret = gpiochip_irqchip_add(&bank->chip, irqc, - irq_base, omap_gpio_irq_handler, + irq_base, handle_bad_irq, IRQ_TYPE_NONE); if (ret) { @@ -1121,10 +1138,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) return -ENODEV; } - gpiochip_set_chained_irqchip(&bank->chip, irqc, - bank->irq, omap_gpio_irq_handler); + gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, NULL); - return 0; + ret = devm_request_irq(bank->dev, bank->irq, omap_gpio_irq_handler, + 0, dev_name(bank->dev), bank); + if (ret) + gpiochip_remove(&bank->chip); + + return ret; } static const struct of_device_id omap_gpio_match[]; @@ -1163,17 +1184,23 @@ static int omap_gpio_probe(struct platform_device *pdev) irqc->irq_unmask = omap_gpio_unmask_irq, irqc->irq_set_type = omap_gpio_irq_type, irqc->irq_set_wake = omap_gpio_wake_enable, + irqc->irq_bus_lock = omap_gpio_irq_bus_lock, + irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock, irqc->name = dev_name(&pdev->dev); - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (unlikely(!res)) { - dev_err(dev, "Invalid IRQ resource\n"); - return -ENODEV; + bank->irq = platform_get_irq(pdev, 0); + if (bank->irq <= 0) { + if (!bank->irq) + bank->irq = -ENXIO; + if (bank->irq != -EPROBE_DEFER) + dev_err(dev, + "can't get irq resource ret=%d\n", bank->irq); + return bank->irq; } - bank->irq = res->start; bank->dev = dev; bank->chip.dev = dev; + bank->chip.owner = THIS_MODULE; bank->dbck_flag = pdata->dbck_flag; bank->stride = pdata->bank_stride; bank->width = pdata->bank_width; @@ -1183,15 +1210,9 @@ static int omap_gpio_probe(struct platform_device *pdev) #ifdef CONFIG_OF_GPIO bank->chip.of_node = of_node_get(node); #endif - if (node) { - if (!of_property_read_bool(node, "ti,gpio-always-on")) - bank->loses_context = true; - } else { - bank->loses_context = pdata->loses_context; - - if (bank->loses_context) - bank->get_context_loss_count = - pdata->get_context_loss_count; + if (!node) { + bank->get_context_loss_count = + pdata->get_context_loss_count; } if (bank->regs->set_dataout && bank->regs->clr_dataout) @@ -1200,15 +1221,26 @@ static int omap_gpio_probe(struct platform_device *pdev) bank->set_dataout = omap_set_gpio_dataout_mask; raw_spin_lock_init(&bank->lock); + raw_spin_lock_init(&bank->wa_lock); /* Static mapping, never released */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); bank->base = devm_ioremap_resource(dev, res); if (IS_ERR(bank->base)) { - irq_domain_remove(bank->chip.irqdomain); return PTR_ERR(bank->base); } + if (bank->dbck_flag) { + bank->dbck = devm_clk_get(bank->dev, "dbclk"); + if (IS_ERR(bank->dbck)) { + dev_err(bank->dev, + "Could not get gpio dbck. Disable debounce\n"); + bank->dbck_flag = false; + } else { + clk_prepare(bank->dbck); + } + } + platform_set_drvdata(pdev, bank); pm_runtime_enable(bank->dev); @@ -1221,8 +1253,11 @@ static int omap_gpio_probe(struct platform_device *pdev) omap_gpio_mod_init(bank); ret = omap_gpio_chip_init(bank, irqc); - if (ret) + if (ret) { + pm_runtime_put_sync(bank->dev); + pm_runtime_disable(bank->dev); return ret; + } omap_gpio_show_rev(bank); @@ -1233,6 +1268,19 @@ static int omap_gpio_probe(struct platform_device *pdev) return 0; } +static int omap_gpio_remove(struct platform_device *pdev) +{ + struct gpio_bank *bank = platform_get_drvdata(pdev); + + list_del(&bank->node); + gpiochip_remove(&bank->chip); + pm_runtime_disable(bank->dev); + if (bank->dbck_flag) + clk_unprepare(bank->dbck); + + return 0; +} + #ifdef CONFIG_ARCH_OMAP2PLUS #if defined(CONFIG_PM) @@ -1321,7 +1369,7 @@ static int omap_gpio_runtime_resume(struct device *dev) * been initialised and so initialise it now. Also initialise * the context loss count. */ - if (bank->loses_context && !bank->context_valid) { + if (!bank->context_valid) { omap_gpio_init_context(bank); if (bank->get_context_loss_count) @@ -1342,17 +1390,15 @@ static int omap_gpio_runtime_resume(struct device *dev) writel_relaxed(bank->context.risingdetect, bank->base + bank->regs->risingdetect); - if (bank->loses_context) { - if (!bank->get_context_loss_count) { + if (!bank->get_context_loss_count) { + omap_gpio_restore_context(bank); + } else { + c = bank->get_context_loss_count(bank->dev); + if (c != bank->context_loss_count) { omap_gpio_restore_context(bank); } else { - c = bank->get_context_loss_count(bank->dev); - if (c != bank->context_loss_count) { - omap_gpio_restore_context(bank); - } else { - raw_spin_unlock_irqrestore(&bank->lock, flags); - return 0; - } + raw_spin_unlock_irqrestore(&bank->lock, flags); + return 0; } } @@ -1418,12 +1464,13 @@ static int omap_gpio_runtime_resume(struct device *dev) } #endif /* CONFIG_PM */ +#if IS_BUILTIN(CONFIG_GPIO_OMAP) void omap2_gpio_prepare_for_idle(int pwr_mode) { struct gpio_bank *bank; list_for_each_entry(bank, &omap_gpio_list, node) { - if (!BANK_USED(bank) || !bank->loses_context) + if (!BANK_USED(bank)) continue; bank->power_mode = pwr_mode; @@ -1437,12 +1484,13 @@ void omap2_gpio_resume_after_idle(void) struct gpio_bank *bank; list_for_each_entry(bank, &omap_gpio_list, node) { - if (!BANK_USED(bank) || !bank->loses_context) + if (!BANK_USED(bank)) continue; pm_runtime_get_sync(bank->dev); } } +#endif #if defined(CONFIG_PM) static void omap_gpio_init_context(struct gpio_bank *p) @@ -1598,6 +1646,7 @@ MODULE_DEVICE_TABLE(of, omap_gpio_match); static struct platform_driver omap_gpio_driver = { .probe = omap_gpio_probe, + .remove = omap_gpio_remove, .driver = { .name = "omap_gpio", .pm = &gpio_pm_ops, @@ -1615,3 +1664,13 @@ static int __init omap_gpio_drv_reg(void) return platform_driver_register(&omap_gpio_driver); } postcore_initcall(omap_gpio_drv_reg); + +static void __exit omap_gpio_exit(void) +{ + platform_driver_unregister(&omap_gpio_driver); +} +module_exit(omap_gpio_exit); + +MODULE_DESCRIPTION("omap gpio driver"); +MODULE_ALIAS("platform:gpio-omap"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/platform_data/gpio-omap.h b/include/linux/platform_data/gpio-omap.h index 5d50b25a73d7..ff43e01b8ca9 100644 --- a/include/linux/platform_data/gpio-omap.h +++ b/include/linux/platform_data/gpio-omap.h @@ -198,7 +198,6 @@ struct omap_gpio_platform_data { int bank_width; /* GPIO bank width */ int bank_stride; /* Only needed for omap1 MPUIO */ bool dbck_flag; /* dbck required or not - True for OMAP3&4 */ - bool loses_context; /* whether the bank would ever lose context */ bool is_mpuio; /* whether the bank is of type MPUIO */ u32 non_wakeup_gpios; @@ -208,9 +207,17 @@ struct omap_gpio_platform_data { int (*get_context_loss_count)(struct device *dev); }; +#if IS_BUILTIN(CONFIG_GPIO_OMAP) extern void omap2_gpio_prepare_for_idle(int off_mode); extern void omap2_gpio_resume_after_idle(void); -extern void omap_set_gpio_debounce(int gpio, int enable); -extern void omap_set_gpio_debounce_time(int gpio, int enable); +#else +static inline void omap2_gpio_prepare_for_idle(int off_mode) +{ +} + +static inline void omap2_gpio_resume_after_idle(void) +{ +} +#endif #endif diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 20267595df07..e0b0d9b419b5 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1008,7 +1008,7 @@ static void noinline __sched rt_spin_lock_slowlock(struct rt_mutex *lock) __set_current_state_no_track(TASK_UNINTERRUPTIBLE); pi_unlock(&self->pi_lock); - ret = task_blocks_on_rt_mutex(lock, &waiter, self, 0); + ret = task_blocks_on_rt_mutex(lock, &waiter, self, RT_MUTEX_MIN_CHAINWALK); BUG_ON(ret); for (;;) { diff --git a/localversion-rt b/localversion-rt index 1199ebade17b..1e584b47c987 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt16 +-rt17 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-12-22[ANNOUNCE] 4.1.15-rt16Sebastian Andrzej Siewior1-2/+2
Dear RT folks! I'm pleased to announce the v4.1.15-rt16 patch set. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-11-18[ANNOUNCE] 4.1.13-rt15Sebastian Andrzej Siewior3-2/+86
Dear RT folks! I'm pleased to announce the v4.1.13-rt15 patch set. Changes since v4.1.13-rt14: Sebastian Andrzej Siewior (1): v4.1.13-rt15 Thomas Gleixner (1): irqwork: Move irq safe work to irq context Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.1.13-rt15 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.13-rt14-rt15.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.13-rt15 The RT patch against 4.1.13 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.13-rt15.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.13-rt15.tar.xz Sebastian diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h --- a/include/linux/irq_work.h +++ b/include/linux/irq_work.h @@ -52,4 +52,10 @@ static inline bool irq_work_needs_cpu(void) { return false; } static inline void irq_work_run(void) { } #endif +#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) +void irq_work_tick_soft(void); +#else +static inline void irq_work_tick_soft(void) { } +#endif + #endif /* _LINUX_IRQ_WORK_H */ diff --git a/kernel/irq_work.c b/kernel/irq_work.c --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -200,8 +200,17 @@ void irq_work_tick(void) if (!llist_empty(raised) && !arch_irq_work_has_interrupt()) irq_work_run_list(raised); + + if (!IS_ENABLED(CONFIG_PREEMPT_RT_FULL)) + irq_work_run_list(this_cpu_ptr(&lazy_list)); +} + +#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) +void irq_work_tick_soft(void) +{ irq_work_run_list(this_cpu_ptr(&lazy_list)); } +#endif /* * Synchronize against the irq_work @entry, ensures the entry is not diff --git a/kernel/time/timer.c b/kernel/time/timer.c --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1455,7 +1455,7 @@ void update_process_times(int user_tick) scheduler_tick(); run_local_timers(); rcu_check_callbacks(user_tick); -#if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL) +#if defined(CONFIG_IRQ_WORK) if (in_irq()) irq_work_tick(); #endif @@ -1471,9 +1471,7 @@ static void run_timer_softirq(struct softirq_action *h) hrtimer_run_pending(); -#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) - irq_work_tick(); -#endif + irq_work_tick_soft(); if (time_after_eq(jiffies, base->timer_jiffies)) __run_timers(base); diff --git a/localversion-rt b/localversion-rt --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt14 +-rt15 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-11-18[ANNOUNCE] 4.1.13-rt14Sebastian Andrzej Siewior282-2674/+1399
Dear RT folks! I'm pleased to announce the v4.1.13-rt14 patch set. Changes since v4.1.12-rt13: none. Known issues: You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-rebase git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-queue The RT patch against 4.1.3 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.13-rt14.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.13-rt14.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-11-07[ANNOUNCE] v4.1.12-rt13Thomas Gleixner4-2/+164
Dear RT folks! I'm pleased to announce the v4.1.12-rt13 patch set. v4.1.12-rt12 is a non-announced update to incorporate the linux-4.1.y stable tree. Changes since v4.1.10-rt11: Yang Shi (1): bpf: Convert hashtab lock to raw lock Thomas Gleixner(2) rtmutex: Handle non enqueued waiters gracefully v4.1.12-rt13 Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.1.12-rt12 is appended below and can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.12-rt12-rt13.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.12-rt13 The RT patch against 4.1.12 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.12-rt13.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.12-rt13.tar.xz Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-11-04v4.1.12-rt12-patchesThomas Gleixner6-147/+33
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-31[ANNOUNCE] 4.1.10.-rt11Thomas Gleixner9-69/+368
Dear RT folks! I'm pleased to announce the v4.1.10-rt11 patch set. Changes since v4.1.10-rt11: Eric Dumazet (1): inet: fix potential deadlock in reqsk_queue_unlink() Josh Cartwright (1): net: Make synchronize_rcu_expedited() conditional on !RT_FULL Mathieu Desnoyers (1): latency_hist: Update sched_wakeup probe Peter Zijlstra (1): sched: Introduce the trace_sched_waking tracepoint Thomas Gleixner (2): softirq: Sanitize local_bh_[en|dis]able for RT v4.1.10-rt11 Yang Shi (1): trace: Add missing tracer macros Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.1.10-rt10 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.10-rt10-rt11.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.10-rt11 The RT patch against 4.1.10 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.10-rt11.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.10-rt11.tar.xz Enjoy! tglx Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-17[ANNOUNCE] 4.1.10-rt10Thomas Gleixner275-1423/+2877
Dear RT folks! I'm pleased to announce the v4.1.10-rt10 patch set. v4.1.10-rt9 is a non-announced update to incorporate the linux-4.1.y stable tree changes. Changes since v4.1.10-rt9: Ben Hutchings (1): work-simple: Add missing #include <linux/export.h> Grygorii Strashko (1): net/core/cpuhotplug: Drain input_pkt_queue lockless Thomas Gleixner (2): arm64/xen: Make XEN depend on !RT v4.1.10-rt10 Yang Shi (2): arm64: Convert patch_lock to raw lock arm64: Replace read_lock to rcu lock in call_break_hook Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.1.10-rt10 is appended below and can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.10-rt9-rt10.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.10-rt10 The RT patch against 4.1.10 can be found here: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.10-rt10.patch.xz The split quilt queue is available at: https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.10-rt10.tar.xz Enjoy! tglx Signed-off-by: Thomas Gleixner <tglx@linutronix.de> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 2cc65a6f4bbd..09a41259b984 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -601,7 +601,7 @@ config XEN_DOM0 config XEN bool "Xen guest support on ARM64" - depends on ARM64 && OF + depends on ARM64 && OF && !PREEMPT_RT_FULL select SWIOTLB_XEN help Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c index b056369fd47d..70654d843d9b 100644 --- a/arch/arm64/kernel/debug-monitors.c +++ b/arch/arm64/kernel/debug-monitors.c @@ -271,20 +271,21 @@ static int single_step_handler(unsigned long addr, unsigned int esr, * Use reader/writer locks instead of plain spinlock. */ static LIST_HEAD(break_hook); -static DEFINE_RWLOCK(break_hook_lock); +static DEFINE_SPINLOCK(break_hook_lock); void register_break_hook(struct break_hook *hook) { - write_lock(&break_hook_lock); - list_add(&hook->node, &break_hook); - write_unlock(&break_hook_lock); + spin_lock(&break_hook_lock); + list_add_rcu(&hook->node, &break_hook); + spin_unlock(&break_hook_lock); } void unregister_break_hook(struct break_hook *hook) { - write_lock(&break_hook_lock); - list_del(&hook->node); - write_unlock(&break_hook_lock); + spin_lock(&break_hook_lock); + list_del_rcu(&hook->node); + spin_unlock(&break_hook_lock); + synchronize_rcu(); } static int call_break_hook(struct pt_regs *regs, unsigned int esr) @@ -292,11 +293,11 @@ static int call_break_hook(struct pt_regs *regs, unsigned int esr) struct break_hook *hook; int (*fn)(struct pt_regs *regs, unsigned int esr) = NULL; - read_lock(&break_hook_lock); - list_for_each_entry(hook, &break_hook, node) + rcu_read_lock(); + list_for_each_entry_rcu(hook, &break_hook, node) if ((esr & hook->esr_mask) == hook->esr_val) fn = hook->fn; - read_unlock(&break_hook_lock); + rcu_read_unlock(); return fn ? fn(regs, esr) : DBG_HOOK_ERROR; } diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 924902083e47..30eb88e5b896 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -77,7 +77,7 @@ bool __kprobes aarch64_insn_is_nop(u32 insn) } } -static DEFINE_SPINLOCK(patch_lock); +static DEFINE_RAW_SPINLOCK(patch_lock); static void __kprobes *patch_map(void *addr, int fixmap) { @@ -124,13 +124,13 @@ static int __kprobes __aarch64_insn_write(void *addr, u32 insn) unsigned long flags = 0; int ret; - spin_lock_irqsave(&patch_lock, flags); + raw_spin_lock_irqsave(&patch_lock, flags); waddr = patch_map(addr, FIX_TEXT_POKE0); ret = probe_kernel_write(waddr, &insn, AARCH64_INSN_SIZE); patch_unmap(FIX_TEXT_POKE0); - spin_unlock_irqrestore(&patch_lock, flags); + raw_spin_unlock_irqrestore(&patch_lock, flags); return ret; } diff --git a/kernel/sched/work-simple.c b/kernel/sched/work-simple.c index c996f755dba6..e57a0522573f 100644 --- a/kernel/sched/work-simple.c +++ b/kernel/sched/work-simple.c @@ -10,6 +10,7 @@ #include <linux/kthread.h> #include <linux/slab.h> #include <linux/spinlock.h> +#include <linux/export.h> #define SWORK_EVENT_PENDING (1 << 0) diff --git a/localversion-rt b/localversion-rt index 22746d6390a4..d79dde624aaa 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt9 +-rt10 diff --git a/net/core/dev.c b/net/core/dev.c index 4969c0d3dd67..f8c23dee5ae9 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7217,7 +7217,7 @@ static int dev_cpu_callback(struct notifier_block *nfb, netif_rx_ni(skb); input_queue_head_incr(oldsd); } - while ((skb = skb_dequeue(&oldsd->input_pkt_queue))) { + while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) { netif_rx_ni(skb); input_queue_head_incr(oldsd); }
2015-09-21[ANNOUNCE] 4.1.7.-rt8Thomas Gleixner9-90/+880
Dear RT folks! I'm pleased to announce the v4.1.7-rt8 patch set. v4.1.6-rt6 and v4.1.7-rt7 are non-announced updates to incorporate the linux-4.1.y stable tree changes. Changes since v4.1.5-rt5: - Update to 4.1.7 - Cherry-pick a XFS lockdep annotation fix from mainline - Use preempt_xxx_nort in the generic implementation of k[un]map_atomic. - Revert d04ea10ba1ea mmc: sdhci: don't provide hard irq handler - Force thread primary handlers of interrupts which provide both a primary and a threaded handler - Move clear_tasks_mm_cpumask() call to __cpu_die() on ARM (Grygoriii) - Fix a RCU splat in the trace histogram (Philipp) Solved issues: - The high CPU usage problem reported by Nicholas turned out to be a scalability issue of the gcov instrumentation Known issues: - bcache stays disabled - CPU hotplug is not better than before - The netlink_release() OOPS, reported by Clark, is still on the list, but unsolved due to lack of information The delta patch against 4.1.7-rt7 is appended below and can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.7-rt7-rt8.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.7-rt8 The RT patch against 4.1.5 can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.7-rt8.patch.xz The split quilt queue is available at: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.7-rt8.tar.xz Enjoy! tglx Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-21v4.1.7-rt7Thomas Gleixner1-2/+2
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-02v4.1.6-rt6Thomas Gleixner1-4/+2
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-16[ANNOUNCE] 4.1.5-rt5Sebastian Andrzej Siewior3-2/+109
Dear RT folks! I'm pleased to announce the v4.1.5-rt5 patch set. Changes since v4.1.5-rt4: - don't disable preemption in dump_stack(). We should not see a backtrace on a production kernel but then it should not increase the latency if trigger one. Known issues: - bcache is disabled. - CPU hotplug works in general. Steven's test script however deadlocks usually on the second invocation. - Clark Williams reported an OOPS in netlink_release() which has not been narrowed down yet. - Nicholas Mc Guire reported high CPU usage by softirq on an idle system which seems to freeze / halt the system. The delta patch against 4.1.5-rt4 is appended below and can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.5-rt4-rt5.patch.xz You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.5-rt5 The RT patch against 4.1.5 can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.5-rt5.patch.xz The split quilt queue is available at: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.5-rt5.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-08-16[ANNOUNCE] 4.1.5-rt4Sebastian Andrzej Siewior1-1/+1
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-07-25[ANNOUNCE] 4.1.3-rt3Sebastian Andrzej Siewior7-5/+265
Dear RT folks! I'm pleased to announce the v4.1.3-rt3 patch set. Changes since v4.1.3-rt2: - fix compile of locktorture. Patch by Wolfgang M. Reimer. - fix compile pid_namespace without lockdep on ARM. Patch by Grygorii Strashko - The annoying "cpufreq_stat_notifier_trans: No policy found" is finally gone. - xor / raid_pq The max latency will increase into the ms range if the raid6_pq is loaded. This should not matter under normal circumstances because that module should only be loaded at boot time if required (and not while a -RT task is active in production). It might also get loaded at run-time manually. Dropping the preempt_disable() might cause different results for the individual implementations. People who don't care (load it at run-time) don't need to load it at all. People who care (load it boot time) would prefer to stick with the best implementation. Therefore I think it is enough to document this (don't load it at run time if you don't need it) and I cross it off my list. Patches are welcome if someone needs / has an improvement. Known issues: - bcache is disabled. - CPU hotplug works in general. Steven's test script however deadlocks usually on the second invocation. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-rebase git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-queue The RT patch against 4.1.3 can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.3-rt3.patch.xz The split quilt queue is available at: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.3-rt3.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-07-254.1.3-rt2Sebastian Andrzej Siewior1-1/+1
Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2015-01-01[ANNOUNCE] 4.1.2-rt1Sebastian Andrzej Siewior267-0/+35249
Dear RT folks! I'm pleased to announce the v4.1.2-rt1 patch set. The move from 4.0 to 4.1 was rather smooth, so we took the time for some overdue cleanups and restructuring of the patch queue. 1) Patch folding - Fold all fixlets into the proper patches - Consolidate the patches which change the same piece of code over and over (e.g. add/revert/redo). These patches were mostly kept to be easily picked up for stable. 2) Dropping obsolete patches Some patches have been superseeded by different upstream changes, so the RT variant is redundant. 3) Changelogs Quite some patches had no or useless changelogs. We updated them all. Each patch has now a From+Subject+Date field. That means "git quiltimport" will produce now the same commit id for each patch (as long as the commit author and date remain unchanged). 4) Reordering The patches got reordered in topics, so patches related to the same subsystem or problem space are grouped together. 5) Ability to build and boot Each step in the queue now builds with RT=n and RT=y. All steps boot with RT=n. With RT=y the functionality is obviously dependent on all patches, so a boot bisectability can not be achieved. As of now we provide a git tree with the RT changes as well. The tree is similar structured as Stevens stable RT tree. For each kernel version we provide 3 branches: linux-m.n.y-rt This branch starts when we move to a new kernel version. After the first release this branch gets only incremental updates (either from the mainline stable tree or from updates to the rt patch queue) linux-m.n.y-rt-rebase This branch is rebased when a new stable version or a new RT patch queue is available. The RT patch queue is applied on top of the latest mainline stable version. linux-m.n.y-queue This branch contains the revisions of the rt patch queue - patches and series file. Known issues: - My AMD box throws a lot of "cpufreq_stat_notifier_trans: No policy found" warnings after boot. It is gone after manually setting the policy (to something else than reported). - bcache is disabled. - CPU hotplug works in general. Steven's test script however deadlocks usually on the second invocation. - xor / raid_pq I had max latency jumping up to 67563us on one CPU while the next lower max was 58us. I tracked it down to module's init code of xor and raid_pq. Both disable preemption while measuring the performance of the individual implementation. The git URLs for this release are git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-rebase git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt-queue The RT patch against 4.1.2 can be found here: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.2-rt1.patch.xz The split quilt queue is available at: https://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.2-rt1.tar.xz Sebastian Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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