From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751778AbcAVDNa (ORCPT ); Thu, 21 Jan 2016 22:13:30 -0500 Received: from e32.co.us.ibm.com ([32.97.110.150]:56770 "EHLO e32.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751091AbcAVDNV (ORCPT ); Thu, 21 Jan 2016 22:13:21 -0500 X-IBM-Helo: d03dlp02.boulder.ibm.com X-IBM-MailFrom: paulmck@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org Date: Thu, 21 Jan 2016 19:13:24 -0800 From: "Paul E. McKenney" To: Davidlohr Bueso Cc: Tim Chen , Ding Tianhong , Peter Zijlstra , Ingo Molnar , "linux-kernel@vger.kernel.org" , Linus Torvalds , Thomas Gleixner , Will Deacon , Jason Low , Waiman Long Subject: Re: [PATCH RFC] locking/mutexes: don't spin on owner when wait list is not NULL. Message-ID: <20160122031324.GI3818@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <56A0A4ED.3070308@huawei.com> <1453411389.30844.38.camel@schen9-desk2.jf.intel.com> <20160122024108.GH3818@linux.vnet.ibm.com> <20160122024854.GB23224@linux-uzut.site> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160122024854.GB23224@linux-uzut.site> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16012203-0005-0000-0000-00001BAB2C6C Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 21, 2016 at 06:48:54PM -0800, Davidlohr Bueso wrote: > On Thu, 21 Jan 2016, Paul E. McKenney wrote: > > >I did some testing, which exposed it to the 0day test robot, which > >did note some performance differences. I was hoping that it would > >clear up some instability from other patches, but no such luck. ;-) > > Oh, that explains why we got a performance regression report :) Plus I suspected that you wanted some extra email. ;-) Thanx, Paul