Messages in this thread | | | Date | Sun, 2 Dec 2007 19:59:45 +0100 | From | Ingo Molnar <> | Subject | Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks |
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* Andi Kleen <andi@firstfloor.org> wrote:
> Ingo Molnar <mingo@elte.hu> writes: > > > this patch extends the soft-lockup detector to automatically > > detect hung TASK_UNINTERRUPTIBLE tasks. Such hung tasks are > > printed the following way: > > That will likely trigger anytime a hard nfs/cifs mount loses its > server for 120s. To make this work you would need a new > TASK_UNINTERRUPTIBLE_EXTERNAL_EVENT or similar and mark all the places > which depend on those.
TASK_KILLABLE should be the right solution i think.
> I've also seen kernel modules that use semaphores like wait queues > While that gives a little funny results (high load average) it worked > so far, until this patch.
it still works with this patch of course. With a funny results like high load average _AND_ a clear debug message that tells us (and the user) where that high load average comes from.
Ingo
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