From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753801AbaBLSXn (ORCPT ); Wed, 12 Feb 2014 13:23:43 -0500 Received: from mail-wi0-f172.google.com ([209.85.212.172]:50959 "EHLO mail-wi0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752762AbaBLSXl (ORCPT ); Wed, 12 Feb 2014 13:23:41 -0500 Date: Wed, 12 Feb 2014 19:23:38 +0100 From: Frederic Weisbecker To: "Paul E. McKenney" , Kevin Hilman , Tejun Heo Cc: Lai Jiangshan , Zoran Markovic , linux-kernel@vger.kernel.org, Shaibal Dutta , Dipankar Sarma , tj@kernel.org Subject: Re: [RFC PATCH] rcu: move SRCU grace period work to power efficient workqueue Message-ID: <20140212182336.GD5496@localhost.localdomain> References: <1391197986-12774-1-git-send-email-zoran.markovic@linaro.org> <52F8A51F.4090909@cn.fujitsu.com> <20140210184729.GL4250@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140210184729.GL4250@linux.vnet.ibm.com> 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 Mon, Feb 10, 2014 at 10:47:29AM -0800, Paul E. McKenney wrote: > On Mon, Feb 10, 2014 at 06:08:31PM +0800, Lai Jiangshan wrote: > > Acked-by: Lai Jiangshan > > Thank you all, queued for 3.15. > > We should also have some facility for moving the SRCU workqueues to > housekeeping/timekeeping kthreads in the NO_HZ_FULL case. Or does > this patch already have that effect? Kevin Hilman and me plan to try to bring a new Kconfig option that could let us control the unbound workqueues affinity through sysfs. The feature actually exist currently but is only enabled for workqueues that have WQ_SYSFS. Writeback and raid5 are the only current users. See for example: /sys/devices/virtual/workqueue/writeback/cpumask