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Bug#838491: linux-image-4.7.0-0.bpo.1-amd64-unsigned: extreme load averages and over 2000 kworker threads

Started byBen Hutchings <ben@decadent.org.uk>
First post2016-10-10 16:30 +0200
Last post2016-10-14 15:50 +0200
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  Bug#838491: linux-image-4.7.0-0.bpo.1-amd64-unsigned: extreme load averages and over 2000 kworker threads Ben Hutchings <ben@decadent.org.uk> - 2016-10-10 16:30 +0200
    Bug#838491: linux-image-4.7.0-0.bpo.1-amd64-unsigned: extreme load averages and over 2000 kworker threads Markus Koeberl <markus.koeberl@tugraz.at> - 2016-10-14 15:50 +0200

#55394 — Bug#838491: linux-image-4.7.0-0.bpo.1-amd64-unsigned: extreme load averages and over 2000 kworker threads

FromBen Hutchings <ben@decadent.org.uk>
Date2016-10-10 16:30 +0200
SubjectBug#838491: linux-image-4.7.0-0.bpo.1-amd64-unsigned: extreme load averages and over 2000 kworker threads
Message-ID<sqJKy-2la-27@gated-at.bofh.it>

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On Mon, 2016-10-10 at 15:41 +0200, Markus Koeberl wrote:
> Package: src:linux
> Followup-For: Bug #838491
> 
> Dear Maintainer,
> 
>    * What led up to the situation?
> 
> upgrade kernel and systemd to the version proveded in jessie-
> backports
> 
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
> 
> during normal usage (slurm cluster node):
> 
> load average: 1290.54, 513.19, 466.29
> 
> the load 5 peaks reache 2000
>
> ps aux | grep kworker | wc -l
> 4188
[...]

I think this might be fixed by "mm: memcontrol: use special workqueue
for creating per-memcg caches" included in version 4.7.6-1.  Let us
know whether that does it.

Ben.

-- 
Ben Hutchings
Unix is many things to many people,
but it's never been everything to anybody.

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#55410

FromMarkus Koeberl <markus.koeberl@tugraz.at>
Date2016-10-14 15:50 +0200
Message-ID<ssb21-1TI-13@gated-at.bofh.it>
In reply to#55394
On Monday 10 October 2016 16:16:30 Ben Hutchings wrote:
>
> I think this might be fixed by "mm: memcontrol: use special workqueue
> for creating per-memcg caches" included in version 4.7.6-1.  Let us
> know whether that does it.

It did not happen again with linux-image-4.7.0-1-amd64-unsigned (4.7.6-1) within the last day.
I guess you can close the BUG.
Thanks!


regards
Markus Köberl
-- 
Markus Koeberl
Graz University of Technology
Signal Processing and Speech Communication Laboratory
E-mail: markus.koeberl@tugraz.at

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