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Date:	Wed, 21 Nov 2012 02:54:35 -0500
From:	Christoph Hellwig <>
To:	"Darrick J. Wong" <>
Subject: Re: [PATCH 1/4] bdi: Track users that require stable page writes

On Tue, Nov 20, 2012 at 06:00:34PM -0800, Darrick J. Wong wrote:
> This creates a per-backing-device counter that tracks the number of users which
> require pages to be held immutable during writeout.  Eventually it will be used
> to waive wait_for_page_writeback() if nobody requires stable pages.

Why are we going down this stupid route again now?  Just let the block
device say it needs stable writes and let the VM deal with it.

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