Messages in this thread | | | Date | Wed, 10 Aug 2016 13:03:57 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] sched: Avoid that __wait_on_bit_lock() hangs |
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On Wed, Aug 10, 2016 at 12:57:25PM +0200, Oleg Nesterov wrote: > This condition is fine, and the trace is clear. This means that lock_page_killable() > was interrupted and wake_bit_function() was not called. We do not need another wakeup > in this case but somehow it helps. Again, I think because the necessary wakeup was > already lost/missed.
I suspect the same. Removing that else generates 'spurious' wakeups, which can unstick the situation, hiding the real source of the problem.
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