linux-kernel - Re: [PATCH] fix quadratic behavior of shrink_dcache

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Message-ID: <ee9e417a0702100457s6ed2c6a3sd5cc45a21db69876@mail.gmail.com>
Date:	Sat, 10 Feb 2007 07:57:46 -0500
From:	"Russ Cox" <rsc@...ch.com>
To:	"Miklos Szeredi" <miklos@...redi.hu>
Cc:	akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix quadratic behavior of shrink_dcache_parent()

> Unfortunately this patch doesn't completely solve this problem, since
> the system will still be hosed due to all memory being used up by
> dentries.  And I bet the OOM killer won't find the real target (du)
> but will kill anything before that.
>
> So the second part of the problem is to somehow limit the number of
> dentries used.  Not easy...

At least with this patch (if I am reading it correctly), once the offending
culprit is identified and the programs are killed off, everything will go
back to normal without a reboot.

Russ
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