linux-kernel - Re: [patch] oom: dump stack and VM state when oom killer panics

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Message-Id: <20090918092427.8E48.A69D9226@jp.fujitsu.com>
Date:	Fri, 18 Sep 2009 09:26:37 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] oom: dump stack and VM state when oom killer panics

Hello

> The oom killer header, including information such as the allocation order
> and gfp mask, current's cpuset and memory controller, call trace, and VM
> state information is currently only shown when the oom killer has
> selected a task to kill.
> 
> This information is omitted, however, when the oom killer panics either
> because of panic_on_oom sysctl settings or when no killable task was
> found.  It is still relevant to know crucial pieces of information such
> as the allocation order and VM state when diagnosing such issues,
> especially at boot.
> 
> This patch displays the oom killer header whenever it panics so that bug
> reports can include pertinent information to debug the issue, if
> possible.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Good patch :)

I have one request. In panic case, I don't hope to call printk_ratelimit().
the infomation should be displayed always.

Thanks.




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