From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757119Ab2EaO2P (ORCPT ); Thu, 31 May 2012 10:28:15 -0400 Received: from 1wt.eu ([62.212.114.60]:2658 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753581Ab2EaO2O (ORCPT ); Thu, 31 May 2012 10:28:14 -0400 Date: Thu, 31 May 2012 16:28:01 +0200 From: Willy Tarreau To: Mike Galbraith Cc: stable , LKML , Dan Williams Subject: Re: [PATCH] [2.6.32-longterm] ioat2: kill pending flag Message-ID: <20120531142801.GL5321@1wt.eu> References: <1338472815.7460.70.camel@marge.simpson.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1338472815.7460.70.camel@marge.simpson.net> User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mike, On Thu, May 31, 2012 at 04:00:15PM +0200, Mike Galbraith wrote: > Greetings, > > While testing tbench 40 throughput on a 40 core (+SMT) Intel SDV S3E37, > I found spin_lock_bh() consuming _90%_ of the box, driving throughput > straight through the floor. The commit below fixed it up. > > This looks horrific enough to me to qualify for 2.6.32-longterm. I've queued it up for next release. Thank you very much! Willy