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| author | Andrew Morton <akpm@linux-foundation.org> | 2012-03-23 23:01:56 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-24 00:58:32 +0100 |
| commit | b60f796c4ca72545327a069f12938360d833cce7 (patch) | |
| tree | dea778b974b2a1396cd85a582557e273cb151b2c /kernel/watchdog.c | |
| parent | kernel/watchdog.c: convert to pr_foo() (diff) | |
| download | linux-b60f796c4ca72545327a069f12938360d833cce7.tar.xz linux-b60f796c4ca72545327a069f12938360d833cce7.zip | |
kernel/watchdog.c: add comment to watchdog() exit path
Revelation from Peter.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@tglx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/watchdog.c')
| -rw-r--r-- | kernel/watchdog.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index a01cb03b045a..df30ee08bdd4 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -349,6 +349,10 @@ static int watchdog(void *unused) set_current_state(TASK_INTERRUPTIBLE); } + /* + * Drop the policy/priority elevation during thread exit to avoid a + * scheduling latency spike. + */ __set_current_state(TASK_RUNNING); sched_setscheduler(current, SCHED_NORMAL, ¶m); return 0; |