From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932478AbVHYBjH (ORCPT ); Wed, 24 Aug 2005 21:39:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932479AbVHYBjH (ORCPT ); Wed, 24 Aug 2005 21:39:07 -0400 Received: from gateway-1237.mvista.com ([12.44.186.158]:2035 "EHLO av.mvista.com") by vger.kernel.org with ESMTP id S932478AbVHYBjG (ORCPT ); Wed, 24 Aug 2005 21:39:06 -0400 Subject: Re: [RFC] RT-patch update to remove the global pi_lock From: Daniel Walker Reply-To: dwalker@mvista.com To: Steven Rostedt Cc: Ingo Molnar , LKML , Thomas Gleixner In-Reply-To: <1124932391.5527.15.camel@localhost.localdomain> References: <1124295214.5764.163.camel@localhost.localdomain> <20050817162324.GA24495@elte.hu> <1124323379.5186.18.camel@localhost.localdomain> <1124333050.5186.24.camel@localhost.localdomain> <20050822075012.GB19386@elte.hu> <1124704837.5208.22.camel@localhost.localdomain> <20050822101632.GA28803@elte.hu> <1124710309.5208.30.camel@localhost.localdomain> <20050822113858.GA1160@elte.hu> <1124715755.5647.4.camel@localhost.localdomain> <20050822183355.GB13888@elte.hu> <1124739657.5809.6.camel@localhost.localdomain> <1124739895.5809.11.camel@localhost.localdomain> <1124749192.17515.16.camel@dhcp153.mvista.com> <1124756775.5350.14.camel@localhost.localdomain> <1124758291.9158.17.camel@dhcp153.mvista.com> <1124760725.5350.47.camel@localhost.localdomain> <1124768282.5350.69.camel@localhost.localdomain> <1124908080.5604.22.camel@localhost.localdomain> <1124917003.5711.8.camel@localhost.localdomain> <1124932391.5527.15.camel@localhost.localdomain> Content-Type: text/plain Organization: MontaVista Date: Wed, 24 Aug 2005 18:38:45 -0700 Message-Id: <1124933925.17712.31.camel@dhcp153.mvista.com> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2005-08-24 at 21:13 -0400, Steven Rostedt wrote: > Well, after turning off hrtimers, I keep getting one bug. A possible > soft lockup with the ext3 code. But this didn't seem to be caused by the > changes I made. So just to be sure, I ran my test on the vanilla > 2.6.13-rc6-rt11 and it gave the same bug too. So, it looks like my > changes are now at par with what is out there with the rt11 release. > They both give the same bug! ;-) > > Attached is the test I ran. I did a > > while : ; do ./test3a_rt ; done > > Where test3a_rt is a C program that does adding, deleting and reading of > files, by different tasks that are each at a different priority. Here's > the soft lockup I'm getting: I got a report of a possible softlockup with setiathome, the trace wasn't a little garbled though . I'm not sure the checking is working correctly . But if it is maybe these spot need some performance analysis . Didn't you changes catch anything that stays in the kernel for 10 seconds or more ? Daniel