Merge branch 'fixes-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
* 'fixes-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: fix deadlock in worker_maybe_bind_and_lock() workqueue: Document debugging tricks Fix up trivial spelling conflict in kernel/workqueue.c
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3fd9952df4
2 changed files with 47 additions and 1 deletions
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@ -1291,8 +1291,14 @@ __acquires(&gcwq->lock)
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return true;
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spin_unlock_irq(&gcwq->lock);
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/* CPU has come up in between, retry migration */
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/*
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* We've raced with CPU hot[un]plug. Give it a breather
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* and retry migration. cond_resched() is required here;
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* otherwise, we might deadlock against cpu_stop trying to
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* bring down the CPU on non-preemptive kernel.
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*/
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cpu_relax();
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cond_resched();
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}
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}
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