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Date: Tue, 29 Sep 2009 10:21:28 -0400 From: Christoph Hellwig <hch@...radead.org> To: Wu Fengguang <fengguang.wu@...el.com> Cc: Christoph Hellwig <hch@...radead.org>, Dave Chinner <david@...morbit.com>, Chris Mason <chris.mason@...cle.com>, Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, "Li, Shaohua" <shaohua.li@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "richard@....demon.co.uk" <richard@....demon.co.uk>, "jens.axboe@...cle.com" <jens.axboe@...cle.com> Subject: Re: regression in page writeback On Tue, Sep 29, 2009 at 10:32:27AM +0800, Wu Fengguang wrote: > > This should help a bit for XFS as it historically does multi-page > > writeouts from ->writepages (and apprently btrfs that added some > > ->writepage ? Yes. > > write-around recently?) but not those brave filesystems only > > implementing the multi-page writeout from writepages as designed. > > Thanks. Just tried write_cache_pages(), looks simple. Need to further > convert all aops->writepages to support lumpy pageout :) Yeah. Most ->writepages instances are just copies of write_cache_pages with local hacks. If you have any good idea to consolidate that that would be great. Also XFS and btrfs do cluster move pages even from ->writepage, I wonder how well that interacts with reclaim. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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