From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752717AbbCLDra (ORCPT ); Wed, 11 Mar 2015 23:47:30 -0400 Received: from mail-qc0-f169.google.com ([209.85.216.169]:35944 "EHLO mail-qc0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750875AbbCLDrY (ORCPT ); Wed, 11 Mar 2015 23:47:24 -0400 Date: Wed, 11 Mar 2015 23:47:20 -0400 From: Tejun Heo To: Austin S Hemmelgarn Cc: Aleksa Sarai , lizefan@huawei.com, mingo@redhat.com, peterz@infradead.org, richard@nod.at, =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [PATCH v4 2/2] cgroups: add a pids subsystem Message-ID: <20150312034720.GE25944@htj.duckdns.org> References: <1424660891-12719-1-git-send-email-cyphar@cyphar.com> <1425606357-6337-1-git-send-email-cyphar@cyphar.com> <1425606357-6337-3-git-send-email-cyphar@cyphar.com> <20150309033405.GE13283@htj.duckdns.org> <54FDED43.4050908@gmail.com> <54FED651.6040100@gmail.com> <55005BAC.9060405@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55005BAC.9060405@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 11, 2015 at 11:13:48AM -0400, Austin S Hemmelgarn wrote: > I did not necessarily word this very clearly. What I meant is that > /proc/sys/kernel/pid_max is essentially an external limiting factor that > caps the total number of pids that can be under the root cgroup and it's > children, not that the cgroup in any way payed attention to it. It might be > useful to be able to just disable the sysctl option and set the value > through the root cgroup, solely or consistency, although such usage isn't > something I would consider essential in any way. Unless there's a compelling reason to implement it, I don't think it's a good idea to add it. The reasons against it have been mentioned a couple times in the thread and AFAICS none is being refuted. Thanks. -- tejun