linux-kernel - Re: [PATCH for 3.2.34] memcg: do not trigger OOM from add_to_page_cache

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Message-ID: <20121130153942.GL29317@dhcp22.suse.cz>
Date:	Fri, 30 Nov 2012 16:39:42 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	azurIt <azurit@...ox.sk>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups mailinglist <cgroups@...r.kernel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH for 3.2.34] memcg: do not trigger OOM from
 add_to_page_cache_locked

On Fri 30-11-12 16:08:11, azurIt wrote:
> >DMA32 zone is usually fills up first 4G unless your HW remaps the rest
> >of the memory above 4G or you have a numa machine and the rest of the
> >memory is at other node. Could you post your memory map printed during
> >the boot? (e820: BIOS-provided physical RAM map: and following lines)
> 
> 
> Here is the full boot log:
> www.watchdog.sk/lkml/kern.log

The log is not complete. Could you paste the comple dmesg output? Or
even better, do you have logs from the previous run?

> >You have mentioned that you are comounting with cpuset. If this happens
> >to be a NUMA machine have you made the access to all nodes available?
> >Also what does /proc/sys/vm/zone_reclaim_mode says?
> 
> 
> Don't really know what NUMA means and which nodes are you talking
> about, sorry :(

http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access
 
> # cat /proc/sys/vm/zone_reclaim_mode
> cat: /proc/sys/vm/zone_reclaim_mode: No such file or directory

OK, so the NUMA is not enabled.
-- 
Michal Hocko
SUSE Labs
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