diff options
| author | Ingo Molnar <mingo@elte.hu> | 2005-01-07 21:53:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-01-07 21:53:24 -0800 |
| commit | 2b5726db9f5d0583eaad993c5a0b99355bf05a20 (patch) | |
| tree | 718af726aa66b66506d3801c8ad1ec436a029a83 /fs | |
| parent | a0332406058f2ffc44c15c60d5650708914465a2 (diff) | |
| download | history-2b5726db9f5d0583eaad993c5a0b99355bf05a20.tar.gz | |
[PATCH] sched: fix scheduling latencies for !PREEMPT kernels
This patch adds a handful of cond_resched() points to a number of key,
scheduling-latency related non-inlined functions.
This reduces preemption latency for !PREEMPT kernels. These are scheduling
points complementary to PREEMPT_VOLUNTARY scheduling points (might_sleep()
places) - i.e. these are all points where an explicit cond_resched() had
to be added.
Has been tested as part of the -VP patchset.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/exec.c | 1 | ||||
| -rw-r--r-- | fs/fs-writeback.c | 1 | ||||
| -rw-r--r-- | fs/select.c | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c index 0bf4d2af69df8f..c401dc74226ea2 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -186,6 +186,7 @@ static int count(char __user * __user * argv, int max) argv++; if(++i > max) return -E2BIG; + cond_resched(); } } return i; diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 969e9b0e0afc14..26f234a0da93d1 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -378,6 +378,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc) list_move(&inode->i_list, &sb->s_dirty); } spin_unlock(&inode_lock); + cond_resched(); iput(inode); spin_lock(&inode_lock); if (wbc->nr_to_write <= 0) diff --git a/fs/select.c b/fs/select.c index 57e776cafb3b37..1de9b6ac7d352f 100644 --- a/fs/select.c +++ b/fs/select.c @@ -240,6 +240,7 @@ int do_select(int n, fd_set_bits *fds, long *timeout) retval++; } } + cond_resched(); } if (res_in) *rinp = res_in; |