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Message-ID: <20110810111547.GZ19099@suse.de>
Date: Wed, 10 Aug 2011 12:15:47 +0100
From: Mel Gorman <mgorman@...e.de>
To: Christoph Hellwig <hch@...radead.org>
Cc: Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
XFS <xfs@....sgi.com>, Dave Chinner <david@...morbit.com>,
Johannes Weiner <jweiner@...hat.com>,
Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
Rik van Riel <riel@...hat.com>,
Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 0/7] Reduce filesystem writeback from page reclaim v3
On Wed, Aug 10, 2011 at 07:00:56AM -0400, Christoph Hellwig wrote:
> On Wed, Aug 10, 2011 at 11:47:13AM +0100, Mel Gorman wrote:
> > o Dropped btrfs warning when filesystems are called from direct
> > reclaim. The fallback method for migration looks indistinguishable
> > from direct reclaim.
>
> The right fix is to simply remove that fallback, possibly in combination
> with implementating real migration support for btrfs.
>
Removing the fallback entirely is overkill as proper migration support
is not going to get 100% coverage but I agree that btrfs should have
real migration support. I didn't think it belonged in this series
though.
--
Mel Gorman
SUSE Labs
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