From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dwight Engen Subject: Re: Protection against container fork bombs [WAS: Re: memcg with kmem limit doesn't recover after disk i/o causes limit to be hit] Date: Wed, 23 Apr 2014 08:49:42 -0400 Message-ID: <20140423084942.560ae837@oracle.com> References: <20140416154650.GA3034@alpha.arachsys.com> <20140418155939.GE4523@dhcp22.suse.cz> <5351679F.5040908@parallels.com> <20140420142830.GC22077@alpha.arachsys.com> <20140422143943.20609800@oracle.com> <20140422200531.GA19334@alpha.arachsys.com> <535758A0.5000500@yuhu.biz> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <535758A0.5000500@yuhu.biz> Sender: owner-linux-mm@kvack.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Marian Marinov Cc: Richard Davies , Vladimir Davydov , Frederic Weisbecker , David Rientjes , Glauber Costa , Tejun Heo , Max Kellermann , Johannes Weiner , William Dauchy , Tim Hockin , Michal Hocko , Daniel Walsh , Daniel Berrange , cgroups@vger.kernel.org, containers@lists.linux-foundation.org, linux-mm@kvack.org On Wed, 23 Apr 2014 09:07:28 +0300 Marian Marinov wrote: > On 04/22/2014 11:05 PM, Richard Davies wrote: > > Dwight Engen wrote: > >> Richard Davies wrote: > >>> Vladimir Davydov wrote: > >>>> In short, kmem limiting for memory cgroups is currently broken. > >>>> Do not use it. We are working on making it usable though. > > ... > >>> What is the best mechanism available today, until kmem limits > >>> mature? > >>> > >>> RLIMIT_NPROC exists but is per-user, not per-container. > >>> > >>> Perhaps there is an up-to-date task counter patchset or similar? > >> > >> I updated Frederic's task counter patches and included Max > >> Kellermann's fork limiter here: > >> > >> http://thread.gmane.org/gmane.linux.kernel.containers/27212 > >> > >> I can send you a more recent patchset (against 3.13.10) if you > >> would find it useful. > > > > Yes please, I would be interested in that. Ideally even against > > 3.14.1 if you have that too. > > Dwight, do you have these patches in any public repo? > > I would like to test them also. Hi Marian, I put the patches against 3.13.11 and 3.14.1 up at: git://github.com/dwengen/linux.git cpuacct-task-limit-3.13 git://github.com/dwengen/linux.git cpuacct-task-limit-3.14 > Marian > > > > > Thanks, > > > > Richard. > > -- > > To unsubscribe from this list: send the line "unsubscribe cgroups" > > in the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > -- 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