From mboxrd@z Thu Jan 1 00:00:00 1970 From: santosh shilimkar Subject: Re: [BUG in v3.18 ?] Seems to be triggered from cgroup code Date: Thu, 12 Feb 2015 09:30:54 -0800 Message-ID: <54DCE34E.1010307@oracle.com> References: <54D402BA.2030307@oracle.com> <54DC439F.2080703@huawei.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <54DC439F.2080703-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Zefan Li Cc: Tejun Heo , cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" On 2/11/2015 10:09 PM, Zefan Li wrote: > On 2015/2/6 7:54, santosh shilimkar wrote: >> Hi Tejun and all, >> >> We observed a BUG (stack is end of the email) while trying do some >> ceph testing. I looked at pidlist_free(), pidlist_array_load() for >> any potential leak but those functions looked fine to me. >> The BUG is not 100% reproducible either so though of reporting >> to the list to get some more pointers. >> > > By saying not 100% reproducible, do you mean it's reproducible but > not very easy to trigger? > Right. We saw it only once in 20+ attempts. > I have to clue how this can happen...This reminds me another bug > report which also happend in pidlist code and it's not reproducible. > > https://lkml.org/lkml/2014/9/16/710 > I was just trying my luck if I can get some more ideas about the potential cause. Thanks for the response !! Regards, Santosh