From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx163.postini.com [74.125.245.163]) by kanga.kvack.org (Postfix) with SMTP id D2C656B0032 for ; Wed, 4 Sep 2013 08:26:34 -0400 (EDT) Date: Wed, 4 Sep 2013 14:26:32 +0200 From: Michal Hocko Subject: Re: [patch 0/7] improve memcg oom killer robustness v2 Message-ID: <20130904122632.GB28285@dhcp22.suse.cz> References: <1375549200-19110-1-git-send-email-hannes@cmpxchg.org> <20130803170831.GB23319@cmpxchg.org> <20130830215852.3E5D3D66@pobox.sk> <20130902123802.5B8E8CB1@pobox.sk> <20130903204850.GA1412@cmpxchg.org> <20130904114523.A9F0173C@pobox.sk> <20130904115741.GA28285@dhcp22.suse.cz> <20130904141000.0F910EFA@pobox.sk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130904141000.0F910EFA@pobox.sk> Sender: owner-linux-mm@kvack.org List-ID: To: azurIt Cc: Johannes Weiner , Andrew Morton , David Rientjes , KAMEZAWA Hiroyuki , KOSAKI Motohiro , linux-mm@kvack.org, cgroups@vger.kernel.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org On Wed 04-09-13 14:10:00, azurIt wrote: > >[...] > >> My script has just detected (and killed) another freezed cgroup. I > >> must say that i'm not 100% sure that cgroup was really freezed but it > >> has 99% or more memory usage for at least 30 seconds (well, or it has > >> 99% memory usage in both two cases the script was checking it). Here > >> are stacks of processes inside it before they were killed: > >[...] > >> pid: 26536 > >> stack: > >> [] refrigerator+0x95/0x160 > >> [] get_signal_to_deliver+0x1cb/0x540 > >> [] do_signal+0x6b/0x750 > >> [] do_notify_resume+0x55/0x80 > >> [] retint_signal+0x3d/0x7b > >> [] 0xffffffffffffffff > > > >[...] > > > >This task is sitting in the refigerator which means it has been frozen > >by the freezer cgroup most probably. I am not familiar with the > >implementation but my recollection is that you have to thaw that group > >in order the killed process can pass away. > > Yes, my script is freezing the cgroup before killing processes inside > it. Stacks are taken after the freeze, it that problem? I thought you had a problem to remove this particular group... -- Michal Hocko SUSE Labs -- 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: email@kvack.org