From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758358Ab3K1OoP (ORCPT ); Thu, 28 Nov 2013 09:44:15 -0500 Received: from merlin.infradead.org ([205.233.59.134]:51357 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751213Ab3K1OoJ (ORCPT ); Thu, 28 Nov 2013 09:44:09 -0500 Date: Thu, 28 Nov 2013 15:43:59 +0100 From: Peter Zijlstra To: Tejun Heo Cc: Oleg Nesterov , zhang.yi20@zte.com.cn, lkml , Tetsuo Handa , Ingo Molnar Subject: Re: [PATCH]: exec: avoid propagating PF_NO_SETAFFINITY into userspace child Message-ID: <20131128144359.GL3694@twins.programming.kicks-ass.net> References: <20131126180420.GA18172@redhat.com> <20131127183117.GB13098@mtj.dyndns.org> <20131128091358.GH10022@twins.programming.kicks-ass.net> <20131128114542.GA3826@redhat.com> <20131128121748.GN10022@twins.programming.kicks-ass.net> <20131128133152.GA821@redhat.com> <20131128133947.GR10022@twins.programming.kicks-ass.net> <20131128141329.GB3925@htj.dyndns.org> <20131128143145.GT10022@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131128143145.GT10022@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 28, 2013 at 03:31:45PM +0100, Peter Zijlstra wrote: > Sure, we absolutely must set it for per-cpu workqueues (and their > workers) otherwise we cannot guarantee correctness. Same for per-node if > we have that. On that, the per-node thing is debatable. There's no correctness issues with per-node stuff as we have with per-cpu storage. And if there's no correctness implications we should not force things.