From: Christoph Lameter <cl@linux.com>
To: "Robert Święcki" <robert@swiecki.net>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: mmap/clone returns ENOMEM with lots of free memory
Date: Tue, 8 May 2012 09:02:46 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1205080859570.25669@router.home> (raw)
In-Reply-To: <CAP145piK2kW4F94pNdKpo_sGg8OD914exOtwCx2o+83jx5Toog@mail.gmail.com>
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On Mon, 7 May 2012, Robert Święcki wrote:
> Yup (btw: I attached dump of some proc files and some debug commands
> in the original e-mail - can be found here
> http://marc.info/?l=linux-kernel&m=133640623421007&w=2 in case some
> MTA removed them)
>
> CommitLimit: 1981528 kB
> Committed_AS: 1916788 kB
>
> just not sure if Committed_AS should present this kind of value. Did I
> just hit a legitimate condition, or may it suggest a bug? I'm a bit
> puzzled cause
This is a legitimate condition. No bug.
>
> root@ise-test:/proc# grep Mem /proc/meminfo
> MemTotal: 3963060 kB
> MemFree: 3098324 kB
Physical memory is free in quantity but virtual memory is exhausted.
> Also, some sysctl values:
> vm.overcommit_memory = 2
> vm.overcommit_ratio = 50
Setting overcommit memory to 2 means that the app is strictly policed
for staying within bounds on virtual memory. Dont do that.
See linux source linux/Documentation/vm/overcommit-accounting for more
details.
next prev parent reply other threads:[~2012-05-08 14:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-07 15:54 Robert Święcki
2012-05-07 20:15 ` Christoph Lameter
2012-05-07 21:41 ` Robert Święcki
2012-05-08 14:02 ` Christoph Lameter [this message]
2012-05-08 14:47 ` Robert Święcki
2012-05-08 15:31 ` Alan Cox
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