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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 20:29:59 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 20:29:59 +0300 |
| commit | 84ed2da02f4cda6759880c87a213ee80c91ca3bd (patch) | |
| tree | a13f3bb09c0efe805cf673b941cc87ca84b06ace | |
| parent | daba2b314a43c53be61eb98e0e88b094398196f5 (diff) | |
| parent | be6a2e4c46cc122ba9113ba569fbc50fad075fff (diff) | |
| download | linux-84ed2da02f4cda6759880c87a213ee80c91ca3bd.tar.xz | |
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Thomas Gleixner:
"A revert of a commit which pointelessly widened a preempt disabled
section which in turn caused might_sleep() to trigger.
The patch intended to prevent usage of smp_processor_id() in
preemptible context, but the usage in that case is fine because the
thread is pinned on a single cpu and therefore cannot be migrated off"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert "sched/core: Do not use smp_processor_id() with preempt enabled in smpboot_thread_fn()"
| -rw-r--r-- | kernel/smpboot.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/smpboot.c b/kernel/smpboot.c index fc0d8270f69e..13bc43d1fb22 100644 --- a/kernel/smpboot.c +++ b/kernel/smpboot.c @@ -122,12 +122,12 @@ static int smpboot_thread_fn(void *data) if (kthread_should_park()) { __set_current_state(TASK_RUNNING); + preempt_enable(); if (ht->park && td->status == HP_THREAD_ACTIVE) { BUG_ON(td->cpu != smp_processor_id()); ht->park(td->cpu); td->status = HP_THREAD_PARKED; } - preempt_enable(); kthread_parkme(); /* We might have been woken for stop */ continue; |