Re: pidns: Make pid accounting and pid_max per namespace

From	Zhang Haoyu <yuzhou@mogujie.com>
Newsgroups	linux.kernel
Subject	Re: pidns: Make pid accounting and pid_max per namespace
Date	2015-10-10 07:00 +0200
Message-ID	<qhUqd-7lP-3@gated-at.bofh.it> (permalink)
References	<qhDfI-7Wk-7@gated-at.bofh.it> <qhTaN-5Bn-1@gated-at.bofh.it> <qhUgx-7aq-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On 10/10/15 12:40, Zhang Haoyu wrote:
> On 10/10/15 11:35, Zefan Li wrote:
>> On 2015/10/9 18:29, Zhang Haoyu wrote:
>>> I started multiple docker containers in centos6.6(linux-2.6.32-504.16.2),
>>> and there's one bad program was running in one container.
>>> This program produced many child threads continuously without free, so more and
>>> more pid numbers were consumed by this program, until hitting the pix_max limit (32768
>>> default in my system ).
>>>
>>> What's worse is that containers and host share the pid numbers resource, so new program
>>> cannot be produced any more in host and other containers.
>>>
>>> And, I clone the upstream kernel source from
>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>> This problem is still there, I'm not sure.
>>>
>>> IMO, we should isolate the pid accounting and pid_max between pid namespaces,
>>> and make them per pidns.
>>> Below post had request for making pid_max per pidns.
>>> http://thread.gmane.org/gmane.linux.kernel/1108167/focus=1111210
>>>
>> Mainline kernel already supports per-cgroup pid limit, which should solve
>> your problem.
>>
> What about pid accounting?
> If one pidns consume too many pids, dose it influence the other pid namespaces?
I found it, thanks very much.
>
> Thanks,
> Zhang Haoyu


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

pidns: Make pid accounting and pid_max per namespace Zhang Haoyu <yuzhou@mogujie.com> - 2015-10-09 12:40 +0200
  Re: pidns: Make pid accounting and pid_max per namespace Zefan Li <lizefan@huawei.com> - 2015-10-10 05:40 +0200
    Re: pidns: Make pid accounting and pid_max per namespace Zhang Haoyu <yuzhou@mogujie.com> - 2015-10-10 06:50 +0200
      Re: pidns: Make pid accounting and pid_max per namespace Zhang Haoyu <yuzhou@mogujie.com> - 2015-10-10 07:00 +0200

csiph-web