linux-kernel - Re: [RFC PATCH 0/5] Reduce filesystem writeback from page reclaim (again)

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Message-ID: <20110714045123.GB3203@infradead.org>
Date:	Thu, 14 Jul 2011 00:51:23 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	Mel Gorman <mgorman@...e.de>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>, XFS <xfs@....sgi.com>,
	Christoph Hellwig <hch@...radead.org>,
	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: [RFC PATCH 0/5] Reduce filesystem writeback from page reclaim
 (again)

On Thu, Jul 14, 2011 at 10:33:40AM +1000, Dave Chinner wrote:
> patchset. After all, that's what I keep asking for (so we can get
> rid of .writepage altogether), and if the numbers don't add up, then
> I'll shut up about it. ;)

Unfortunately there's a few more users of ->writepage in addition to
memory reclaim.  The most visible on is page migration, but there's also
a write_one_page helper used by a few filesystems that would either
need to get a writepage-like callback or a bigger rewrite.

I agree that killing of ->writepage would be a worthwhile goal, though.

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