From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f200.google.com (mail-wr0-f200.google.com [209.85.128.200]) by kanga.kvack.org (Postfix) with ESMTP id C5F486B0261 for ; Fri, 1 Dec 2017 12:13:56 -0500 (EST) Received: by mail-wr0-f200.google.com with SMTP id c3so6220414wrd.0 for ; Fri, 01 Dec 2017 09:13:56 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id j9si2610287edf.166.2017.12.01.09.13.54 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 01 Dec 2017 09:13:55 -0800 (PST) Date: Fri, 1 Dec 2017 18:13:53 +0100 From: Michal Hocko Subject: Re: [PATCH v13 6/7] mm, oom, docs: describe the cgroup-aware OOM killer Message-ID: <20171201171353.jkv2nq2m3y3hiejn@dhcp22.suse.cz> References: <20171130152824.1591-1-guro@fb.com> <20171130152824.1591-7-guro@fb.com> <20171201084154.l7i3fxtxd4fzrq7s@dhcp22.suse.cz> <20171201170149.GB27436@castle.DHCP.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171201170149.GB27436@castle.DHCP.thefacebook.com> Sender: owner-linux-mm@kvack.org List-ID: To: Roman Gushchin Cc: linux-mm@vger.kernel.org, Johannes Weiner , Vladimir Davydov , Tetsuo Handa , Andrew Morton , David Rientjes , Tejun Heo , kernel-team@fb.com, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org On Fri 01-12-17 17:01:49, Roman Gushchin wrote: [...] > diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt > index c80a147f94b7..ff8e92db636d 100644 > --- a/Documentation/cgroup-v2.txt > +++ b/Documentation/cgroup-v2.txt > @@ -1049,6 +1049,9 @@ PAGE_SIZE multiple when read back. > and will never kill the unkillable task, even if memory.oom_group > is set. > > + If cgroup-aware OOM killer is not enabled, ENOTSUPP error > + is returned on attempt to access the file. > + > memory.events > A read-only flat-keyed file which exists on non-root cgroups. > The following entries are defined. Unless specified > @@ -1258,6 +1261,12 @@ OOM Killer > Cgroup v2 memory controller implements a cgroup-aware OOM killer. > It means that it treats cgroups as first class OOM entities. > > +Cgroup-aware OOM logic is turned off by default and requires > +passing the "groupoom" option on mounting cgroupfs. It can also > +by remounting cgroupfs with the following command:: > + > + # mount -o remount,groupoom $MOUNT_POINT > + > Under OOM conditions the memory controller tries to make the best > choice of a victim, looking for a memory cgroup with the largest > memory footprint, considering leaf cgroups and cgroups with the Looks good to me Thanks! -- 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