From: Wu Fengguang <fengguang.wu@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>,
David Woodhouse <dwmw2@infradead.org>,
David Howells <dhowells@redhat.com>,
Minchan Kim <minchan.kim@gmail.com>, Mel Gorman <mel@csn.ul.ie>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Lameter <cl@linux-foundation.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"tytso@mit.edu" <tytso@mit.edu>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"elladan@eskimo.com" <elladan@eskimo.com>,
"npiggin@suse.de" <npiggin@suse.de>,
"Barnes, Jesse" <jesse.barnes@intel.com>
Subject: Re: Found the commit that causes the OOMs
Date: Wed, 1 Jul 2009 19:27:05 +0800 [thread overview]
Message-ID: <20090701112705.GA3102@localhost> (raw)
In-Reply-To: <20090701132757.85DC.A69D9226@jp.fujitsu.com>
On Wed, Jul 01, 2009 at 01:30:51PM +0900, KOSAKI Motohiro wrote:
> > > > The question is: Why kswapd reclaims are absent here?
Ah, maybe kswapd simply didn't have the opportunity to be scheduled
for running, because msgctl11 is busy forking thousands of processes?
> > > if direct reclaim isolate all pages, kswapd can't reclaim any pages.
> >
> > OOM will occur in that condition. What happened before that time?
>
> maybe yes, maybe no.
> At first test, the system still have droppable file cache. if direct
> reclaim luckly take it, the benchmark become successful end, I
> think.
Yes that's the main difference between first and second run. Note that
file cache can be dropped quickly, while the pageout of tmpfs pages
populated by msgctl11 itself takes time.
Thanks,
Fengguang
next prev parent reply other threads:[~2009-07-01 11:27 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-17 2:23 [PATCH 0/3] make mapped executable pages the first class citizen Wu Fengguang
2009-05-17 2:23 ` [PATCH 1/3] vmscan: report vm_flags in page_referenced() Wu Fengguang
2009-05-17 2:23 ` [PATCH 2/3] vmscan: make mapped executable pages the first class citizen Wu Fengguang
2009-05-19 8:59 ` Wu Fengguang
2009-05-17 2:23 ` [PATCH 3/3] vmscan: merge duplicate code in shrink_active_list() Wu Fengguang
2009-05-18 9:16 ` Wu Fengguang
2009-05-19 2:43 ` Wu Fengguang
2009-05-19 10:18 ` Johannes Weiner
2009-05-19 10:32 ` Wu Fengguang
2009-06-18 14:46 ` [PATCH 0/3] make mapped executable pages the first class citizen David Howells
2009-06-19 5:24 ` Wu Fengguang
2009-06-19 5:58 ` Wu Fengguang
2009-06-19 8:06 ` David Howells
2009-06-18 14:51 ` David Howells
2009-06-18 16:18 ` David Howells
2009-06-18 16:57 ` Andrew Morton
2009-06-20 4:33 ` Wu Fengguang
2009-06-20 8:24 ` David Howells
2009-06-23 14:43 ` David Howells
2009-06-24 1:43 ` KOSAKI Motohiro
2009-06-24 2:32 ` Wu Fengguang
2009-06-24 2:43 ` KOSAKI Motohiro
2009-06-24 2:49 ` Wu Fengguang
2009-06-27 11:53 ` Johannes Weiner
2009-06-27 18:40 ` David Howells
2009-06-24 13:07 ` David Howells
2009-06-27 7:12 ` Found the commit that causes the OOMs David Howells
2009-06-27 12:07 ` Minchan Kim
2009-06-27 12:54 ` Johannes Weiner
2009-06-27 13:50 ` Minchan Kim
2009-06-27 15:36 ` Johannes Weiner
2009-06-28 16:53 ` Minchan Kim
2009-06-27 15:52 ` KOSAKI Motohiro
2009-06-28 11:32 ` Wu Fengguang
2009-06-28 13:30 ` Minchan Kim
2009-06-28 13:36 ` Minchan Kim
2009-06-28 14:22 ` Wu Fengguang
2009-06-28 15:01 ` KOSAKI Motohiro
2009-06-28 15:10 ` Wu Fengguang
2009-06-28 16:50 ` Minchan Kim
2009-06-29 0:17 ` Minchan Kim
2009-06-29 7:34 ` Wu Fengguang
2009-06-29 10:10 ` David Howells
2009-06-29 12:55 ` Wu Fengguang
2009-06-29 14:21 ` David Howells
2009-06-29 15:00 ` Minchan Kim
2009-06-29 15:14 ` Wu Fengguang
2009-06-29 15:54 ` David Howells
2009-06-29 15:56 ` David Woodhouse
2009-06-30 14:05 ` Wu Fengguang
2009-06-30 15:50 ` Minchan Kim
2009-07-01 2:30 ` Wu Fengguang
2009-07-01 1:18 ` KOSAKI Motohiro
2009-07-01 2:13 ` Rik van Riel
2009-07-01 2:16 ` Wu Fengguang
2009-07-01 2:26 ` Wu Fengguang
2009-07-01 2:51 ` KOSAKI Motohiro
2009-07-01 2:57 ` Rik van Riel
2009-07-01 4:06 ` Wu Fengguang
2009-07-01 4:18 ` KOSAKI Motohiro
2009-07-01 4:25 ` Wu Fengguang
2009-07-01 4:30 ` KOSAKI Motohiro
2009-07-01 11:27 ` Wu Fengguang [this message]
2009-07-05 9:55 ` Wu Fengguang
2009-07-05 10:38 ` KOSAKI Motohiro
2009-07-05 10:51 ` Wu Fengguang
2009-07-01 3:54 ` Wu Fengguang
2009-06-29 16:07 ` Mel Gorman
2009-06-30 4:07 ` Minchan Kim
2009-06-30 9:22 ` Mel Gorman
2009-06-30 9:30 ` Minchan Kim
2009-06-30 14:00 ` Minchan Kim
2009-06-30 19:57 ` David Howells
2009-07-02 7:41 ` Minchan Kim
2009-07-02 7:44 ` Minchan Kim
2009-07-02 12:43 ` Wu Fengguang
2009-07-02 14:08 ` Minchan Kim
2009-06-29 15:27 ` David Howells
2009-06-28 14:49 ` KOSAKI Motohiro
2009-06-28 15:04 ` Wu Fengguang
2009-06-28 16:47 ` Minchan Kim
2009-06-29 7:48 ` KOSAKI Motohiro
2009-06-29 9:32 ` Minchan Kim
2009-06-29 12:43 ` David Howells
2009-06-29 12:59 ` Wu Fengguang
2009-06-29 16:57 ` Andrew Morton
2009-06-29 18:54 ` KOSAKI Motohiro
2009-06-29 19:08 ` KOSAKI Motohiro
2009-06-27 18:35 ` David Howells
2009-06-27 18:58 ` David Howells
2009-06-28 7:55 ` David Howells
2009-06-19 5:27 ` [PATCH 0/3] make mapped executable pages the first class citizen Wu Fengguang
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