From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juri Lelli Subject: Re: [PATCH v7 0/5] cpuset: Enable cpuset controller in default hierarchy Date: Mon, 23 Apr 2018 15:57:56 +0200 Message-ID: <20180423135756.GC32341@localhost.localdomain> References: <1524145624-23655-1-git-send-email-longman@redhat.com> <20180423130715.GA32341@localhost.localdomain> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20180423130715.GA32341@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Waiman Long Cc: Tejun Heo , Li Zefan , Johannes Weiner , Peter Zijlstra , Ingo Molnar , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kernel-team@fb.com, pjt@google.com, luto@amacapital.net, Mike Galbraith , torvalds@linux-foundation.org, Roman Gushchin On 23/04/18 15:07, Juri Lelli wrote: > Hi Waiman, > > On 19/04/18 09:46, Waiman Long wrote: > > v7: > > - Add a root-only cpuset.cpus.isolated control file for CPU isolation. > > - Enforce that load_balancing can only be turned off on cpusets with > > CPUs from the isolated list. > > - Update sched domain generation to allow cpusets with CPUs only > > from the isolated CPU list to be in separate root domains. > Guess I'll be adding comments as soon as I stumble on something unclear (to me :), hope that's OK (shout if I should do it differently). The below looked unexpected to me: root@debian-kvm:/sys/fs/cgroup# cat g1/cpuset.cpus 2-3 root@debian-kvm:/sys/fs/cgroup# cat g1/cpuset.mems root@debian-kvm:~# echo $$ > /sys/fs/cgroup/g1/cgroup.threads root@debian-kvm:/sys/fs/cgroup# cat g1/cgroup.threads 2312 So I can add tasks to groups with no mems? Or is it this only true in my case with a single mem node? Or maybe it's inherited from root group (slightly confusing IMHO if that's the case).