Bug#949171: linux: Please, enable COMPACTION for armel/marvell to mitigate OOMs

From	Luca Olivetti <luca@ventoso.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.ports.arm, linux.debian.kernel
Subject	Bug#949171: linux: Please, enable COMPACTION for armel/marvell to mitigate OOMs
Date	2020-02-28 20:20 +0100
Message-ID	<zEQ3L-3SB-1@gated-at.bofh.it> (permalink)
References	<zpEHf-7cX-1@gated-at.bofh.it> <zpEHf-7cX-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 3 groups.

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El 17/1/20 a les 19:31, Rogério Brito ha escrit:
> Source: linux
> Version: 4.19.67-2+deb10u2
> Severity: important
> X-Debbugs-CC: debian-arm@lists.debian.org
> 
> Hi, Ben and others.
> 
> I've been getting some OOM errors on my armel/kirkwood device running Debian
> stable. One of the reasons for this is, according to the dmesg logs, that
> COMPACT (memory compaction) is tried, but not available:
> 
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> $ grep -i compact /boot/config-4.19.0-6-marvell
> # CONFIG_COMPACTION is not set
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

I'm running debian stretch on a lacie network space 2 (armel/kirkwood) 
and lately I'm seeing a lot of OOM errors, however I'm not sure it's 
just a problem of CONFIG_COMPACTION: the previous kernel had it not set 
either and I don't remember experiencing that many OOM.
I'm seeing them just after the latest kernel update I made on February 9 
2020. It's possible that I just missed them previously, though I doubt 
it since this machine is doing too many things and I would have noticed 
if some vital process stopped.

The remnant of the kernel (3.16.0) in jessie that I still have on this 
machine had CONFIG_COMPACTION enabled.


$  grep -i compact /boot/config*
/boot/config-3.16.0-8-kirkwood:CONFIG_COMPACTION=y
/boot/config-4.9.0-11-marvell:# CONFIG_COMPACTION is not set
/boot/config-4.9.0-12-marvell:# CONFIG_COMPACTION is not set


Bye
-- 
Luca

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Bug#949171: linux: Please, enable COMPACTION for armel/marvell to mitigate OOMs Rogério Brito <rbrito@ime.usp.br> - 2020-01-17 19:40 +0100
  Bug#949171: linux: Please, enable COMPACTION for armel/marvell to mitigate OOMs Luca Olivetti <luca@ventoso.org> - 2020-02-28 20:20 +0100

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