From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758273Ab3LFOwv (ORCPT ); Fri, 6 Dec 2013 09:52:51 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51319 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751076Ab3LFOwt (ORCPT ); Fri, 6 Dec 2013 09:52:49 -0500 Date: Fri, 6 Dec 2013 15:53:22 +0100 From: Oleg Nesterov To: Christoph Lameter Cc: Tejun Heo , Frederic Weisbecker , Peter Zijlstra , zhang.yi20@zte.com.cn, lkml , Tetsuo Handa , Ingo Molnar Subject: Re: [PATCH 1/1] usermodehelper: kill ____call_usermodehelper()->set_cpus_allowed_ptr() Message-ID: <20131206145322.GB2674@redhat.com> References: <20131128143155.GC3925@htj.dyndns.org> <20131128150055.GA11956@redhat.com> <20131128150233.GA10022@twins.programming.kicks-ass.net> <20131128193330.GA24767@redhat.com> <20131128193349.GB24767@redhat.com> <20131205143745.GA18488@redhat.com> <20131205143903.GA3231@htj.dyndns.org> <20131205153016.GA20705@redhat.com> <00000142c42d9708-c1154c9a-4265-45ee-971f-a6c8b5768ebf-000000@email.amazonses.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000142c42d9708-c1154c9a-4265-45ee-971f-a6c8b5768ebf-000000@email.amazonses.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/05, Christoph Lameter wrote: > > On Thu, 5 Dec 2013, Oleg Nesterov wrote: > > > Perhaps, I simply do not know what the users want. > > We would like to control OS spawning of threads and restrict them to a > limited set of cpus so that the other processors can do latency sensitive > work without being impacted by creation of kernel threads etc. This probably means that Tejun's "default attributes which are inherited by all workqueues" suggestion was right. Oleg.