linux-kernel - Re: [PATCH] mm: check zone->all_unreclaimable in all

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Message-ID: <4D75E4E6.9020507@gmail.com>
Date:	Tue, 08 Mar 2011 11:12:22 +0300
From:	Andrew Vagin <avagin@...il.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Andrey Vagin <avagin@...nvz.org>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: check zone->all_unreclaimable in all_unreclaimable()

Hi, All
> I agree with Minchan and can't think this is a real fix....
> Andrey, I'm now trying your fix and it seems your fix for oom-killer,
> 'skip-zombie-process' works enough good for my environ.
>
> What is your enviroment ? number of cpus ? architecture ? size of memory ?
Processort: AMD Phenom(tm) II X6 1055T Processor (six-core)
Ram: 8Gb
RHEL6, x86_64. This host doesn't have swap.

It hangs up fast. Tomorrow I will have to send a processes state, if it 
will be interesting for you. With my patch the kernel work fine. I added 
debug and found that it hangs up in the described case.
I suppose that my patch may be incorrect, but the problem exists and we 
should do something.

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