Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966480AbXHIPco (ORCPT ); Thu, 9 Aug 2007 11:32:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965947AbXHIPap (ORCPT ); Thu, 9 Aug 2007 11:30:45 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:35845 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965892AbXHIPan (ORCPT ); Thu, 9 Aug 2007 11:30:43 -0400 Subject: Re: 2.6.23-rc2-mm1: hang, prop_norm_single involved From: Peter Zijlstra To: Alexey Dobriyan Cc: akpm@osdl.org, linux-kernel@vger.kernel.org, apw In-Reply-To: <1186663502.20108.28.camel@twins> References: <20070809111044.GA6575@localhost.sw.ru> <1186663502.20108.28.camel@twins> Content-Type: text/plain Date: Thu, 09 Aug 2007 17:30:32 +0200 Message-Id: <1186673432.20108.32.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1324 Lines: 34 On Thu, 2007-08-09 at 14:45 +0200, Peter Zijlstra wrote: > On Thu, 2007-08-09 at 15:10 +0400, Alexey Dobriyan wrote: > > LTP run reproducably hangs during rwtest01 test > > rwtest -N rwtest01 -c -q -i 60s -f sync 10%25000:rs-sync=$$ > > Calltrace is always the same: > > > [root@opteron ~]# PATH=/testcases/bin/:$PATH /testcases/bin/rwtest -N rwtest01 -c -q -i 60s -f sync 10%25000:rs-sync=$$ > rwtest01 1 PASS : Test passed > [root@opteron ~]# PATH=/testcases/bin/:$PATH /testcases/bin/rwtest -N rwtest01 -c -q -i 60s -f sync 10%25000:rs-sync=$$ > > I can reproduce, but not always. > > Also, since the task->dirties member is initialized in fork.c this > should either _always_ happen or never. So this does point to some > memory corruption, ->dirties is the very last member of the task struct. > > /me goes try with slab_debug,... to no avail, banging head against the wall what is happening here. Andrew, could you: # mm-dirty-balancing-for-tasks.patch while I try to figure this one out? That seems to make the unhappies I could reproduce here go away. - 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/