From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261680AbTJXWmA (ORCPT ); Fri, 24 Oct 2003 18:42:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261965AbTJXWmA (ORCPT ); Fri, 24 Oct 2003 18:42:00 -0400 Received: from fw.osdl.org ([65.172.181.6]:64910 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261680AbTJXWl6 (ORCPT ); Fri, 24 Oct 2003 18:41:58 -0400 Date: Fri, 24 Oct 2003 15:42:51 -0700 From: Dave Olien To: kernel@kolivas.org, piggin@cyberone.com.au Cc: linux-kernel@vger.kernel.org Subject: Re: [BUG] linux 2.6.0-test8 reaim tests (attachment URL) Message-ID: <20031024224251.GA15399@osdl.org> References: <20031024220821.GA15231@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20031024220821.GA15231@osdl.org> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org My attachment was too big to send directly to lkml. You can find it at: http://developer.osdl.org/dmo/REAIM/typescript_stp8-002 On Fri, Oct 24, 2003 at 03:08:21PM -0700, Dave Olien wrote: > > I've observed in the last two days, linux 2.6.0-test8 and I think > linux 2.6.0-test8-mm1. The reaim test workload fails to exit. > All of the reaim tasks are blocked in sys_wait4(). But non of > them seem to have any obvious child processes. > > There are also lots of sync() processes. Many of those seem to be > blocked somewhere scheduling IO. These kernels were all with the > as-isoched IO scheduler. I may retry with deadline scheduler, just > to rule out IO scheduler. Is there any link between the sync() > processes and the reaim waiting for children? > > Could there be a problem with IO not completing for the sync() > tasks that causes the reaim tasks to not complete? > > Attached is a console output from a system hung in this state. > Included (towards the bottom) is a sysrq t output. > > I'm hoping to investigate this more closely over the week end.