linux-kernel - Re: [PATCH] reiserfs: don't drop PG_dirty when releasing sub-page-sized dirty file

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Date:	Tue, 23 Oct 2007 10:10:53 -0400
From:	Chris Mason <chris.mason@...cle.com>
To:	Fengguang Wu <wfg@...l.ustc.edu.cn>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeff Mahoney <jeffm@...e.com>, reiserfs-dev@...esys.com,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] reiserfs: don't drop PG_dirty when releasing
 sub-page-sized dirty file

On Tue, 23 Oct 2007 19:56:20 +0800
Fengguang Wu <wfg@...l.ustc.edu.cn> wrote:

> On Tue, Oct 23, 2007 at 12:07:07PM +0200, Peter Zijlstra wrote:
> > [ adding reiserfs devs to the CC ]
> 
> Thank you.
> 
> This fix is kind of crude - even when it fixed Maxim's problem, and
> survived my stress testing of a lot of patching and kernel compiling.
> I'd be glad to see better solutions.

This should be safe, reiserfs has the buffer heads themselves clean and
the page should get cleaned eventually.  The cancel_dirty_page call was
just an optimization to be VM friendly.

-chris
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