Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754373AbaGEDOa (ORCPT ); Fri, 4 Jul 2014 23:14:30 -0400 Received: from g4t3426.houston.hp.com ([15.201.208.54]:49198 "EHLO g4t3426.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753943AbaGEDO3 (ORCPT ); Fri, 4 Jul 2014 23:14:29 -0400 Message-ID: <1404530065.2572.8.camel@j-VirtualBox> Subject: Re: [regression, 3.16-rc] rwsem: optimistic spinning causing performance degradation From: Jason Low To: Davidlohr Bueso Cc: Dave Chinner , Peter Zijlstra , Tim Chen , Ingo Molnar , linux-kernel@vger.kernel.org, Linus Torvalds Date: Fri, 04 Jul 2014 20:14:25 -0700 In-Reply-To: <1404463996.2457.10.camel@buesod1.americas.hpqcorp.net> References: <1404413420.8764.42.camel@j-VirtualBox> <20140704010147.GY4453@dastard> <1404438366.8764.121.camel@j-VirtualBox> <1404438890.8764.125.camel@j-VirtualBox> <20140704061306.GK9508@dastard> <1404457579.8764.161.camel@j-VirtualBox> <1404463996.2457.10.camel@buesod1.americas.hpqcorp.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2014-07-04 at 01:53 -0700, Davidlohr Bueso wrote: > On Fri, 2014-07-04 at 00:06 -0700, Jason Low > > Subject: [PATCH] rwsem: In rwsem_can_spin_on_owner(), return false if no owner > > Could we change the subject to something more descriptive, ie: > > rwsem: Allow conservative optimistic spinning for reader/writer paths Sure, a Subject like this would better explain what is the effect of the patch. -- 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/