linux-kernel - Re: Out of memory and no killable processes: 2.6.22-2-686-bigmem

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Message-ID: <20071219055550.GE21042@denkbrett.schottelius.org>
Date:	Wed, 19 Dec 2007 06:55:50 +0100
From:	Nico Schottelius <nico-kernel-20071219@...ottelius.org>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Out of memory and no killable processes: 2.6.22-2-686-bigmem

Hello Robert,

Robert Hancock [Tue, Dec 18, 2007 at 06:43:22PM -0600]:
> How much RAM is in these machines?

8 GiB

> If you're running tons of memory, it 
> really is better to run a 64-bit kernel if possible.

Sure? Afaik that results in a bit slower access to memory and appart
from being able to address MUCH more memory doesn't change the
situation.

Perhaps I missed something.

And updating to 64 Bit kernel also implies changing the userland, so
a reinstall would be necessary, wouldn't it?

> I believe there are 
> some cases where low memory can be pretty easily exhausted on machines with 
> lots of high memory.

Some minutes ago the third machine of that type freezed.
with 7 GiB of *free* memory, before getting oom+panic.

The thing that looks pretty the same is that the inode table / open
inodes shrinked very heavy from 41k to about 2k before the freeze
in about 3 days.

Same kernel, same Dell 1955 hardware, different machine.

Is it possible to debug this issue somehow?

Nico

-- 
Think about Free and Open Source Software (FOSS).
http://nico.schottelius.org/documentations/foss/the-term-foss/

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