Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932844AbbGJTGC (ORCPT ); Fri, 10 Jul 2015 15:06:02 -0400 Received: from resqmta-ch2-10v.sys.comcast.net ([69.252.207.42]:58690 "EHLO resqmta-ch2-10v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932514AbbGJTF5 (ORCPT ); Fri, 10 Jul 2015 15:05:57 -0400 Date: Fri, 10 Jul 2015 14:05:56 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@east.gentwo.org To: Frederic Weisbecker cc: Oleg Nesterov , LKML , Rik van Riel , Andrew Morton Subject: Re: [PATCH 2/5] kmod: Use system_unbound_wq instead of khelper In-Reply-To: <20150710181055.GB26428@lerouge> Message-ID: References: <1436465237-22031-1-git-send-email-fweisbec@gmail.com> <1436465237-22031-3-git-send-email-fweisbec@gmail.com> <20150709224406.GA17528@redhat.com> <20150710134739.GA25078@lerouge> <20150710171208.GA26428@lerouge> <20150710181055.GB26428@lerouge> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 807 Lines: 17 On Fri, 10 Jul 2015, Frederic Weisbecker wrote: > Note that nohz full is perfectly fine with that. The issue I'm worried about > is the case where drivers spawn hundreds of jobs and it all happen on the same > node because the kernel threads inherit the workqueue affinity, instead of > the global affinity that khelper had. Well if this is working as intended here then the kernel threads will only run on a specific cpu. As far as we can tell the amout of kernel threads spawned is rather low and also the performance requirements on those threads are low. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/