From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758418Ab3K1O52 (ORCPT ); Thu, 28 Nov 2013 09:57:28 -0500 Received: from mail-qa0-f48.google.com ([209.85.216.48]:59692 "EHLO mail-qa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751271Ab3K1O50 (ORCPT ); Thu, 28 Nov 2013 09:57:26 -0500 Date: Thu, 28 Nov 2013 09:57:23 -0500 From: Tejun Heo To: Peter Zijlstra 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: <20131128145723.GH3925@htj.dyndns.org> References: <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> <20131128143848.GD3925@htj.dyndns.org> <20131128145505.GX10022@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131128145505.GX10022@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 28, 2013 at 03:55:05PM +0100, Peter Zijlstra wrote: > Because that is exactly what some users desire? Some RT and HPC people > want all those crypt jobs to run on a few designated cpus and not wreck > their compute jobs. And you can't do that reliably from userland. Those things are created dynamically. workqueue provides per-workqueue attributes to enable those use cases. It doesn't have system-wide default attributes right now but adding that shouldn't be too difficult. -- tejun