From: Minchan Kim <minchan.kim@gmail.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andy Whitcroft <apw@shadowen.org>, Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mel@csn.ul.ie>, Christoph Hellwig <hch@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Dave Chinner <david@fromorbit.com>,
Chris Mason <chris.mason@oracle.com>,
Nick Piggin <npiggin@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andreas Mohr <andi@lisas.de>, Bill Davidsen <davidsen@tmr.com>,
Ben Gamari <bgamari.foss@gmail.com>
Subject: Re: [PATCH] vmscan: remove wait_on_page_writeback() from pageout()
Date: Thu, 29 Jul 2010 01:29:53 +0900 [thread overview]
Message-ID: <20100728162953.GB5401@barrios-desktop> (raw)
In-Reply-To: <20100728084654.GA26776@localhost>
On Wed, Jul 28, 2010 at 04:46:54PM +0800, Wu Fengguang wrote:
> And the wait page-by-page behavior of pageout(SYNC) will lead to very
> long stall time if running into some range of dirty pages. So it's bad
> idea anyway to call wait_on_page_writeback() inside pageout().
Although we remove it in pageout, shrink_page_list still has it.
So it would result in long stall. And it is for lumpy reclaim which
means it's a trade-off, I think.
--
Kind regards,
Minchan Kim
next prev parent reply other threads:[~2010-07-28 16:30 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-28 7:17 [PATCH] vmscan: raise the bar to PAGEOUT_IO_SYNC stalls Wu Fengguang
2010-07-28 7:49 ` Minchan Kim
2010-07-28 8:46 ` [PATCH] vmscan: remove wait_on_page_writeback() from pageout() Wu Fengguang
2010-07-28 9:10 ` Mel Gorman
2010-07-28 9:30 ` Wu Fengguang
2010-07-28 9:45 ` Mel Gorman
2010-07-28 9:43 ` KOSAKI Motohiro
2010-07-28 9:50 ` Mel Gorman
2010-07-28 9:59 ` KOSAKI Motohiro
2010-08-01 5:27 ` Wu Fengguang
2010-08-01 5:49 ` Wu Fengguang
2010-08-01 8:32 ` KOSAKI Motohiro
2010-08-01 8:35 ` Wu Fengguang
2010-08-01 8:40 ` KOSAKI Motohiro
2010-08-01 5:17 ` Wu Fengguang
2010-07-28 16:29 ` Minchan Kim [this message]
2010-07-28 11:40 ` Why PAGEOUT_IO_SYNC stalls for a long time KOSAKI Motohiro
2010-07-28 13:10 ` Mel Gorman
2010-07-29 10:34 ` KOSAKI Motohiro
2010-07-29 14:24 ` Mel Gorman
2010-07-30 4:54 ` KOSAKI Motohiro
2010-07-30 10:30 ` Mel Gorman
2010-08-01 8:47 ` KOSAKI Motohiro
2010-08-04 11:10 ` Mel Gorman
2010-08-05 6:20 ` KOSAKI Motohiro
2010-08-05 8:09 ` Andreas Mohr
2010-07-28 17:30 ` Andrew Morton
2010-07-29 1:01 ` KOSAKI Motohiro
2010-07-30 13:17 ` [PATCH] vmscan: raise the bar to PAGEOUT_IO_SYNC stalls Andrea Arcangeli
2010-07-30 13:31 ` Mel Gorman
2010-07-31 16:13 ` Wu Fengguang
2010-07-31 17:33 ` Christoph Hellwig
2010-07-31 17:55 ` Pekka Enberg
2010-07-31 17:59 ` Christoph Hellwig
2010-07-31 18:09 ` Pekka Enberg
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