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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-14 09:06:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-14 09:06:29 -0700 |
| commit | 7fb30d2b606beb78cda805647faf4d3cdfb39c42 (patch) | |
| tree | bdc82e9f3bc812dceb87d59108031eeab860cf2f /kernel | |
| parent | a2c7a54fcc36dc3d0d461e883d9535f8f52f5a3f (diff) | |
| parent | d3251859168b0b12841e1b90d6d768ab478dc23d (diff) | |
| download | lwn-7fb30d2b606beb78cda805647faf4d3cdfb39c42.tar.gz lwn-7fb30d2b606beb78cda805647faf4d3cdfb39c42.zip | |
Merge branch 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fix from Tejun Heo:
"A fix for a workqueue_congested() regression that broke fscache"
* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: workqueue_congested() shouldn't translate WORK_CPU_UNBOUND into node number
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/workqueue.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 4aa9f5bc6b2d..1ae602809efb 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4311,6 +4311,12 @@ bool current_is_workqueue_rescuer(void) * no synchronization around this function and the test result is * unreliable and only useful as advisory hints or for debugging. * + * If @cpu is WORK_CPU_UNBOUND, the test is performed on the local CPU. + * Note that both per-cpu and unbound workqueues may be associated with + * multiple pool_workqueues which have separate congested states. A + * workqueue being congested on one CPU doesn't mean the workqueue is also + * contested on other CPUs / NUMA nodes. + * * RETURNS: * %true if congested, %false otherwise. */ @@ -4321,6 +4327,9 @@ bool workqueue_congested(int cpu, struct workqueue_struct *wq) rcu_read_lock_sched(); + if (cpu == WORK_CPU_UNBOUND) + cpu = smp_processor_id(); + if (!(wq->flags & WQ_UNBOUND)) pwq = per_cpu_ptr(wq->cpu_pwqs, cpu); else |