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| author | Peter Zijlstra <peterz@infradead.org> | 2014-09-24 10:18:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-10-28 10:56:57 +0100 |
| commit | 3427445afd26bd2395f29241319283a93f362cd0 (patch) | |
| tree | 7c1b04953b3744a518bfb380d63dc5f518ce8100 /include/linux/kernel.h | |
| parent | 8eb23b9f35aae413140d3fda766a98092c21e9b0 (diff) | |
| download | linux-3427445afd26bd2395f29241319283a93f362cd0.tar.gz | |
sched: Exclude cond_resched() from nested sleep test
cond_resched() is a preemption point, not strictly a blocking
primitive, so exclude it from the ->state test.
In particular, preemption preserves task_struct::state.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: tglx@linutronix.de
Cc: ilya.dryomov@inktank.com
Cc: umgwanakikbuti@gmail.com
Cc: oleg@redhat.com
Cc: Alex Elder <alex.elder@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Axel Lin <axel.lin@ingics.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140924082242.656559952@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 5068a0d9fecd76..446d76a87ba17f 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -162,6 +162,7 @@ extern int _cond_resched(void); #endif #ifdef CONFIG_DEBUG_ATOMIC_SLEEP + void ___might_sleep(const char *file, int line, int preempt_offset); void __might_sleep(const char *file, int line, int preempt_offset); /** * might_sleep - annotation for functions that can sleep @@ -177,6 +178,8 @@ extern int _cond_resched(void); do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) # define sched_annotate_sleep() __set_current_state(TASK_RUNNING) #else + static inline void ___might_sleep(const char *file, int line, + int preempt_offset) { } static inline void __might_sleep(const char *file, int line, int preempt_offset) { } # define might_sleep() do { might_resched(); } while (0) |