Re: [Bug 190191] New: kswapd0 spirals out of control

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On Thu 05-01-17 11:42:33, Andrew Morton wrote:
> 
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
> 
> On Mon, 12 Dec 2016 19:38:23 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote:
> 
> > https://bugzilla.kernel.org/show_bug.cgi?id=190191
> > 
> >             Bug ID: 190191
> >            Summary: kswapd0 spirals out of control
> >            Product: Memory Management
> >            Version: 2.5
> >     Kernel Version: 4.8.0+
> >           Hardware: i386
> >                 OS: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: high
> >           Priority: P1
> >          Component: Other
> >           Assignee: akpm@xxxxxxxxxxxxxxxxxxxx
> >           Reporter: dh@xxxxxxxxxxxxxxxxx
> >         Regression: No
> 
> I'd say "Regression: yes".
> 
> Additional details at the link.  There's no indication which commit(s)
> broke it.
> 
> > Created attachment 247481
> >   --> https://bugzilla.kernel.org/attachment.cgi?id=247481&action=edit
> > config for 4.7
> > 
> > I'm currently running 4.7.10 with no problems, but when i tried to upgrade to
> > 4.8.0 (and just now, 4.9.0) i encountered a problem that makes my system
> > unusable.

Considering this is 32b kernel and we know that node reclaim (introduced
in 4.8) is broken with memcg enabled because Normal zone inactive list
might not be aged properly I would suggest trying to run with
http://lkml.kernel.org/r/20170104100825.3729-1-mhocko@xxxxxxxxxx
applied. It is hard to tell anything more without further information
though.
-- 
Michal Hocko
SUSE Labs

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