From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan.kim@gmail.com>,
Andrew Vagin <avagin@gmail.com>, Andrey Vagin <avagin@openvz.org>,
Mel Gorman <mel@csn.ul.ie>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: check zone->all_unreclaimable in all_unreclaimable()
Date: Tue, 8 Mar 2011 12:06:36 +0900 (JST) [thread overview]
Message-ID: <20110308120615.7EB9.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20110308094438.1ba05ed2.kamezawa.hiroyu@jp.fujitsu.com>
> > > Hmm.. Although it solves the problem, I think it's not a good idea that
> > > depends on false alram and give up the retry.
> >
> > Any alternative proposals? We should get the livelock fixed if possible..
>
> 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 ?
me too. 'skip-zombie-process V1' work fine. and I didn't seen this patch
improve oom situation.
And, The test program is purely fork bomb. Our oom-killer is not silver
bullet for fork bomb from very long time ago. That said, oom-killer send
SIGKILL and start to kill the victim process. But, it doesn't prevent
to be created new memory hogging tasks. Therefore we have no gurantee
to win process exiting and creating race.
*IF* we really need to care fork bomb issue, we need to write completely
new VM feature.
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next prev parent reply other threads:[~2011-03-08 3:06 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-05 11:44 Andrey Vagin
2011-03-05 15:20 ` Minchan Kim
2011-03-05 15:34 ` Andrew Vagin
2011-03-05 15:53 ` Minchan Kim
2011-03-05 16:41 ` Andrew Vagin
2011-03-05 17:07 ` Minchan Kim
2011-03-07 21:58 ` Andrew Morton
2011-03-07 23:45 ` Minchan Kim
2011-03-09 5:37 ` KAMEZAWA Hiroyuki
2011-03-09 5:43 ` KAMEZAWA Hiroyuki
2011-03-10 6:58 ` Minchan Kim
2011-03-10 23:58 ` KAMEZAWA Hiroyuki
2011-03-11 0:18 ` Minchan Kim
2011-03-11 6:08 ` avagin
2011-03-14 1:03 ` Minchan Kim
2011-03-08 0:44 ` KAMEZAWA Hiroyuki
2011-03-08 3:06 ` KOSAKI Motohiro [this message]
2011-03-08 19:02 ` avagin
2011-03-09 5:52 ` KAMEZAWA Hiroyuki
2011-03-09 6:17 ` KOSAKI Motohiro
2011-03-10 14:08 ` KOSAKI Motohiro
2011-03-08 8:12 ` Andrew Vagin
2011-03-09 6:06 ` KAMEZAWA Hiroyuki
2011-05-04 1:38 ` CAI Qian
2011-05-09 6:54 ` KOSAKI Motohiro
2011-05-09 8:47 ` CAI Qian
2011-05-09 9:19 ` KOSAKI Motohiro
2011-05-10 8:11 ` OOM Killer don't works at all if the system have >gigabytes memory (was Re: [PATCH] mm: check zone->all_unreclaimable in all_unreclaimable()) KOSAKI Motohiro
2011-05-10 8:14 ` [PATCH 1/4] oom: improve dump_tasks() show items KOSAKI Motohiro
2011-05-10 23:29 ` David Rientjes
2011-05-13 10:14 ` KOSAKI Motohiro
2011-05-10 8:15 ` [PATCH 2/4] oom: kill younger process first KOSAKI Motohiro
2011-05-10 23:31 ` David Rientjes
2011-05-13 10:15 ` KOSAKI Motohiro
2011-05-11 23:33 ` Minchan Kim
2011-05-12 0:52 ` KAMEZAWA Hiroyuki
2011-05-12 1:30 ` Minchan Kim
2011-05-12 1:53 ` KAMEZAWA Hiroyuki
2011-05-12 2:23 ` Minchan Kim
2011-05-12 3:39 ` KAMEZAWA Hiroyuki
2011-05-12 4:17 ` Minchan Kim
2011-05-12 14:38 ` Paul E. McKenney
2011-05-13 10:18 ` KOSAKI Motohiro
2011-05-10 8:15 ` [PATCH 3/4] oom: oom-killer don't use permillage of system-ram internally KOSAKI Motohiro
2011-05-10 23:40 ` David Rientjes
2011-05-13 10:30 ` KOSAKI Motohiro
2011-05-10 8:16 ` [PATCH 4/4] oom: don't kill random process KOSAKI Motohiro
2011-05-10 23:41 ` David Rientjes
2011-05-10 23:22 ` OOM Killer don't works at all if the system have >gigabytes memory (was Re: [PATCH] mm: check zone->all_unreclaimable in all_unreclaimable()) David Rientjes
2011-05-11 2:30 ` CAI Qian
2011-05-11 20:34 ` David Rientjes
2011-05-12 0:13 ` Minchan Kim
2011-05-12 19:38 ` David Rientjes
2011-05-13 4:16 ` Minchan Kim
2011-05-13 11:04 ` KOSAKI Motohiro
2011-05-16 20:42 ` David Rientjes
2011-05-13 6:53 ` CAI Qian
2011-05-16 20:46 ` David Rientjes
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