Re: [BUG] memcg: panic when rmdir()

[Li Zefan <lizf@cn.fujitsu.com>]

KAMEZAWA Hiroyuki wrote:
> On Fri, 16 Jan 2009 14:24:39 +0800
> Li Zefan <lizf@cn.fujitsu.com> wrote:
> 
>> KAMEZAWA Hiroyuki wrote:
>>> 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
>>>>
>>> Isn't this a problem Nishimura fixed today ?
>>>
>> Are you sure?
>>
> Sorry, I didn't see BUG! line in you log.
> 

I've tested with Nishimura's patch applied, and as is expected, this bug
is totally different from the one Nishimura has fixed.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>