From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764059AbYFFGsL (ORCPT ); Fri, 6 Jun 2008 02:48:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752386AbYFFGr5 (ORCPT ); Fri, 6 Jun 2008 02:47:57 -0400 Received: from mx1.redhat.com ([66.187.233.31]:59094 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751721AbYFFGr4 (ORCPT ); Fri, 6 Jun 2008 02:47:56 -0400 Message-ID: <4848DD3C.9000001@redhat.com> Date: Fri, 06 Jun 2008 08:46:20 +0200 From: Milan Broz User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Alasdair G Kergon CC: Yan Li , Andrew Morton , Ritesh Raj Sarraf , Christophe Saout , linux-kernel@vger.kernel.org, dm-devel@redhat.com, Herbert Xu , rjmaomao@gmail.com, dm-crypt@saout.de Subject: Re: 2.6.24 Kernel Soft Lock Up with heavy I/O in dm-crypt References: <20080602030738.GA7761@yantp.cn.ibm.com> <48439890.6030904@redhat.com> <20080602123145.GA8258@yantp.cn.ibm.com> <4843ECB8.4010002@redhat.com> <20080605224410.GA7584@yantp.cn.ibm.com> In-Reply-To: <20080605224410.GA7584@yantp.cn.ibm.com> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yan Li wrote: > On Mon, Jun 02, 2008 at 02:51:04PM +0200, Milan Broz wrote: >> Patch for 2.6.24 kernel >> Add cond_resched() to prevent stuck in big bio processing. > > This patch actual has lead to performance _gain_. hmmm, nice:) > With patched kernel, soft lockup _no longer_ occurred. Alasdair, please could you move this patch back to actual tree and sent it upstream? We have at least two separate reports confirming that it fixes the problem. Milan -- mbroz@redhat.com