linux-kernel - Re: readahead and oom

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Message-ID: <20110426055521.GA18473@localhost>
Date:	Tue, 26 Apr 2011 13:55:21 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Dave Young <hidave.darkstar@...il.com>
Cc:	linux-mm <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: readahead and oom

On Tue, Apr 26, 2011 at 01:49:25PM +0800, Dave Young wrote:
> Hi,
> 
> When memory pressure is high, readahead could cause oom killing.
> IMHO we should stop readaheading under such circumstances。If it's true
> how to fix it?

Good question. Before OOM there will be readahead thrashings, which
can be addressed by this patch:

http://lkml.org/lkml/2010/2/2/229

However there seems no much interest on that feature.. I can separate
that out and resubmit it standalone if necessary.

Thanks,
Fengguang
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