On Wed, Oct 31, 2012 at 09:38:47PM -0700, David Rientjes wrote:
> On Thu, 1 Nov 2012, Minchan Kim wrote:
>
> > If mutiple threads are page faulting and try to allocate memory, then they
> > should go to oom path and they will reach following code.
> >
> > if (task->flags & PF_EXITING) {
> > if (task == current)
> > return OOM_SCAN_SELECT;
> >
>
> No, OOM_SCAN_SELECT does not return immediately and kill that process; it
> only prefers to kill that process first iff the oom killer isn't deferred
> because it finds TIF_MEMDIE threads or other PF_EXITING threads other than
> current. So if multiple processes are in the exit path with PF_EXITING
> and require additional memory then the oom killed may defer without
> killing anything. That's what I suspect is happening in this case.
Indeed.
Thanks for correcting me, David.
>
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Kind regards,
Minchan Kim
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