linux-kernel - Re: oom_killer crash linux system

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Message-Id: <20101018180919.3AF8.A69D9226@jp.fujitsu.com>
Date:	Mon, 18 Oct 2010 18:10:00 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	"Figo.zhang" <zhangtianfei@...dcoretech.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Wu Fengguang <fengguang.wu@...el.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rientjes@...gle.com" <rientjes@...gle.com>,
	figo1802 <figo1802@...il.com>
Subject: Re: oom_killer crash linux system

> 
> i want to test the oom-killer. My desktop (Dell optiplex 780, i686
> kernel)have 2GB ram, i turn off the swap partition, and open a huge pdf
> files and applications, and let the system eat huge ram.
> 
> in 2.6.35, i can use ram up to 1.75GB,
> 
> but in 2.6.36-rc8, i just use to 1.53GB ram , the system come very slow
> and crashed after some minutes , the DiskIO is very busy. i see the
> DiskIO read is up to 8MB/s, write just only 400KB/s, (see by conky).
> 
> what change between 2.6.35 to 2.6.36-rc8? is it low performance about
> page reclaim and page writeback in high press ram useage?

very lots of change ;)
can you please send us your crash log?



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