From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>,
LKML <linux-kernel@vger.kernel.org>
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Chris Mason <chris.mason@oracle.com>, Nick Piggin <npiggin@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>, Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Subject: [PATCH 0/5] [RFC] transfer ASYNC vmscan writeback IO to the flusher threads
Date: Thu, 29 Jul 2010 19:51:42 +0800 [thread overview]
Message-ID: <20100729115142.102255590@intel.com> (raw)
Andrew,
It's possible to transfer ASYNC vmscan writeback IOs to the flusher threads.
This simple patchset shows the basic idea. Since it's a big behavior change,
there are inevitably lots of details to sort out. I don't know where it will
go after tests and discussions, so the patches are intentionally kept simple.
sync livelock avoidance (need more to be complete, but this is minimal required for the last two patches)
[PATCH 1/5] writeback: introduce wbc.for_sync to cover the two sync stages
[PATCH 2/5] writeback: stop periodic/background work on seeing sync works
[PATCH 3/5] writeback: prevent sync livelock with the sync_after timestamp
let the flusher threads do ASYNC writeback for pageout()
[PATCH 4/5] writeback: introduce bdi_start_inode_writeback()
[PATCH 5/5] vmscan: transfer async file writeback to the flusher
The last two patches are the meats, they depend on the first three patches to
kick the background writeback work, so that the for_reclaim writeback can be
serviced timely.
Comments are welcome!
Thanks,
Fengguang
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next reply other threads:[~2010-07-29 11:51 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-29 11:51 Wu Fengguang [this message]
2010-07-29 11:51 ` [PATCH 1/5] writeback: introduce wbc.for_sync to cover the two sync stages Wu Fengguang
2010-07-29 15:04 ` Jan Kara
2010-07-30 5:10 ` Wu Fengguang
2010-07-29 11:51 ` [PATCH 2/5] writeback: stop periodic/background work on seeing sync works Wu Fengguang
2010-07-29 16:20 ` Jan Kara
2010-07-30 4:03 ` Wu Fengguang
2010-08-02 20:51 ` Jan Kara
2010-08-03 3:01 ` Wu Fengguang
2010-08-03 10:55 ` Jan Kara
2010-08-03 12:39 ` Jan Kara
2010-08-03 12:59 ` Wu Fengguang
2010-08-03 13:18 ` Jan Kara
2010-08-03 13:22 ` Wu Fengguang
2010-08-03 13:44 ` Wu Fengguang
2010-08-03 13:48 ` Wu Fengguang
2010-08-03 14:36 ` Wu Fengguang
2010-07-29 11:51 ` [PATCH 3/5] writeback: prevent sync livelock with the sync_after timestamp Wu Fengguang
2010-07-29 15:02 ` Jan Kara
2010-07-30 5:17 ` Wu Fengguang
2010-07-29 11:51 ` [PATCH 4/5] writeback: introduce bdi_start_inode_writeback() Wu Fengguang
2010-07-29 11:51 ` [PATCH 5/5] vmscan: transfer async file writeback to the flusher Wu Fengguang
2010-07-29 16:09 ` [PATCH 0/5] [RFC] transfer ASYNC vmscan writeback IO to the flusher threads Jan Kara
2010-07-30 5:34 ` Wu Fengguang
2010-07-29 23:23 ` Dave Chinner
2010-07-30 7:58 ` Wu Fengguang
2010-07-30 9:22 ` KOSAKI Motohiro
2010-07-30 12:25 ` Wu Fengguang
2010-07-30 11:12 ` Dave Chinner
2010-07-30 13:18 ` Wu Fengguang
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