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Date: Thu, 11 Aug 2011 19:45:16 -0400
From: Christoph Hellwig <hch@infradead.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>, Rik van Riel <riel@redhat.com>,
        Jan Kara <jack@suse.cz>, LKML <linux-kernel@vger.kernel.org>,
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        Minchan Kim <minchan.kim@gmail.com>,
        Wu Fengguang <fengguang.wu@intel.com>,
        Johannes Weiner <jweiner@redhat.com>
Subject: Re: [PATCH 0/7] Reduce filesystem writeback from page reclaim v3
Message-ID: <20110811234516.GA21649@infradead.org>
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On Wed, Aug 10, 2011 at 12:15:47PM +0100, Mel Gorman wrote:
> > 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

It seems like btrfs is indeed the only important one missing.