Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762926AbXIXTOp (ORCPT ); Mon, 24 Sep 2007 15:14:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755189AbXIXTOf (ORCPT ); Mon, 24 Sep 2007 15:14:35 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:39288 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755322AbXIXTOe (ORCPT ); Mon, 24 Sep 2007 15:14:34 -0400 Date: Mon, 24 Sep 2007 12:12:55 -0700 From: Andrew Morton To: Badari Pulavarty Cc: Andy Whitcroft , Linus Torvalds , sct@redhat.com, adilger@clusterfs.com, ext4 , lkml , mel@csn.ul.ie, Michal Piotrowski , Oleg Nesterov Subject: Re: 2.6.23-rc6: hanging ext3 dbench tests Message-Id: <20070924121255.2ef7ab3a.akpm@linux-foundation.org> In-Reply-To: <1190656918.13955.7.camel@dyn9047017100.beaverton.ibm.com> References: <20070911124202.GI9556@shadowen.org> <20070911173049.GA10499@shadowen.org> <20070914094905.GA32670@shadowen.org> <20070919181546.GA4343@shadowen.org> <1190656918.13955.7.camel@dyn9047017100.beaverton.ibm.com> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1317 Lines: 32 On Mon, 24 Sep 2007 11:01:58 -0700 Badari Pulavarty wrote: > Hi Andy, > > I managed to reproduce the dbench problem. (not sure if its the same > thing or not - but symptoms are same). My problem has nothing to do > with ext3. I can produce it on ext2, jfs also. > > Whats happening on my machine is .. > > dbench forks of 4 children and sends them a signal to start the work. > 3 out of 4 children gets the signal and does the work. One of the child > never gets the signal so, it waits forever in pause(). So, parent waits > for a longtime to kill it. > > BTW, I was trying to find out when this problem started showing up. > So far, I managed to track it to 2.6.23-rc4. (2.6.23-rc3 doesn't seem > to have this problem). I am going to do bi-sect and find out which > patch caused this. > > I am using dbench-2.0 which consistently reproduces the problem on > my x86-64 box. Did you find anything new with your setup ? > Thanks, Badari. That sounds like a bit of a showstopper for 2.6.23. Michal, do you have this regression in the dirt file? - 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/