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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Rik van Riel <riel@redhat.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
	Wu Fengguang <fengguang.wu@intel.com>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Minchan Kim <minchan.kim@gmail.com>
Subject: Re: [RFC PATCH 1/2] vmscan don't isolate too many pages in a zone
Date: Thu,  9 Jul 2009 15:39:20 +0900 (JST)	[thread overview]
Message-ID: <20090709153753.23AD.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20090708215105.5016c929@bree.surriel.com>

Hi

> When way too many processes go into direct reclaim, it is possible
> for all of the pages to be taken off the LRU.  One result of this
> is that the next process in the page reclaim code thinks there are
> no reclaimable pages left and triggers an out of memory kill.
> 
> One solution to this problem is to never let so many processes into
> the page reclaim path that the entire LRU is emptied.  Limiting the
> system to only having half of each inactive list isolated for
> reclaim should be safe.

Thanks good patch.
I'd like to run several benchmark and compare my and your patches.

Can you please gime me few days?




  parent reply	other threads:[~2009-07-09  6:39 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-07  9:40 [RFC PATCH 0/2] fix unnecessary accidental OOM problem on concurrent reclaim KOSAKI Motohiro
2009-07-07  9:47 ` [RFC PATCH 1/2] vmscan don't isolate too many pages KOSAKI Motohiro
2009-07-07 13:23   ` Wu Fengguang
2009-07-07 18:59   ` Rik van Riel
2009-07-08  3:19     ` Wu Fengguang
2009-07-09  1:51       ` [RFC PATCH 1/2] vmscan don't isolate too many pages in a zone Rik van Riel
2009-07-09  2:47         ` Wu Fengguang
2009-07-09  3:07           ` Wu Fengguang
2009-07-09  7:01             ` KOSAKI Motohiro
2009-07-09  8:42               ` Wu Fengguang
2009-07-09 11:07                 ` Minchan Kim
2009-07-09  6:39         ` KOSAKI Motohiro [this message]
2009-07-07 23:39   ` [RFC PATCH 1/2] vmscan don't isolate too many pages Minchan Kim
2009-07-09  3:12     ` KOSAKI Motohiro
2009-07-07  9:48 ` [RFC PATCH 2/2] Don't continue reclaim if the system have plenty free memory KOSAKI Motohiro
2009-07-07 13:20   ` Minchan Kim
2009-07-09  5:08     ` KOSAKI Motohiro
2009-07-09 10:58       ` Minchan Kim
2009-07-13  0:37         ` KOSAKI Motohiro

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