Re: [RFC PATCH 1/2] mm, vmscan: account the number of isolated pages per zone

From: Michal Hocko
Date: Tue Feb 21 2017 - 10:53:50 EST

On Tue 21-02-17 23:35:07, Tetsuo Handa wrote:
> Michal Hocko wrote:
> > OK, so it seems that all the distractions are handled now and linux-next
> > should provide a reasonable base for testing. You said you weren't able
> > to reproduce the original long stalls on too_many_isolated(). I would be
> > still interested to see those oom reports and potential anomalies in the
> > isolated counts before I send the patch for inclusion so your further
> > testing would be more than appreciated. Also stalls > 10s without any
> > previous occurrences would be interesting.
> I confirmed that linux-next-20170221 with kmallocwd applied can reproduce
> infinite too_many_isolated() loop problem. Please send your patches to linux-next.

So I assume that you didn't see the lockup with the patch applied and
the OOM killer has resolved the situation by killing other tasks, right?
Can I assume your Tested-by?

Thanks for your testing!
Michal Hocko