From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [BUG] memcg: panic when rmdir()
Date: Fri, 16 Jan 2009 15:29:53 +0900 [thread overview]
Message-ID: <20090116152953.894c8c7d.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <497025E8.8050207@cn.fujitsu.com>
On Fri, 16 Jan 2009 14:15:04 +0800
Li Zefan <lizf@cn.fujitsu.com> wrote:
> Found this when testing memory resource controller, can be triggered
> with:
> - CONFIG_CGROUP_MEM_RES_CTLR_SWAP=n
> - or CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
> - or CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y && boot with noswapaccount
>
> # mount -t cgroup -o memory xxx /mnt
> # mkdir /mnt/0
> # for pid in `cat /mnt/tasks`; do echo $pid > /mnt/0/tasks; done
> # echo "low limit" > /mnt/0/tasks
> # do whatever to allocate some memory
> # swapoff -a
> killed (by OOM)
> # for pid in `cat /mnt/0/tasks`; do echo $pid > /mnt/tasks; done
> # rmdir /mnt/0
>
Hmm, it seems css->refcnt is bad (css->refcnt < 0). maybe css_put is not
called without css_get().
will chase. thank you for testing.
-Kame
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next prev parent reply other threads:[~2009-01-16 6:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-16 6:15 Li Zefan
2009-01-16 6:19 ` KAMEZAWA Hiroyuki
2009-01-16 6:24 ` Li Zefan
2009-01-16 6:30 ` KAMEZAWA Hiroyuki
2009-01-16 7:00 ` Li Zefan
2009-01-16 6:29 ` KAMEZAWA Hiroyuki [this message]
2009-01-16 6:58 ` Daisuke Nishimura
2009-01-16 8:07 ` KAMEZAWA Hiroyuki
2009-01-16 8:26 ` Daisuke Nishimura
2009-01-16 9:12 ` KAMEZAWA Hiroyuki
2009-01-16 9:23 ` [BUGFIX] [PATCH] memcg: fix refcnt handling at swapoff KAMEZAWA Hiroyuki
2009-01-16 9:13 ` [BUG] memcg: panic when rmdir() Daisuke Nishimura
2009-01-16 9:16 ` KAMEZAWA Hiroyuki
2009-01-16 8:33 ` Li Zefan
2009-01-16 8:40 ` KAMEZAWA Hiroyuki
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