linux-kernel - Re: ext4: ext23 support leaks buffer pages

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Message-ID: <20110110175234.GD3128@thunk.org>
Date:	Mon, 10 Jan 2011 12:52:34 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Amir Goldstein <amir73il@...rs.sf.net>,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: ext4: ext23 support leaks buffer pages

On Mon, Jan 10, 2011 at 02:54:26AM -0800, Hugh Dickins wrote:
> I switched to CONFIG_EXT4_USE_FOR_EXT23=y with 2.6.37, but was
> then surprised by OOM kills: 2.6.36 and current are also bad.

Oops.  Yeah, the problem was when ext4_forget() was moved out of
ext4_free_branches, we needed to replace it with a call to brelse().
Thanks for pointing this out.

Patch follows...

					- Ted
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