From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752064AbXCHPJB (ORCPT ); Thu, 8 Mar 2007 10:09:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752067AbXCHPJA (ORCPT ); Thu, 8 Mar 2007 10:09:00 -0500 Received: from nf-out-0910.google.com ([64.233.182.184]:20405 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752064AbXCHPI7 (ORCPT ); Thu, 8 Mar 2007 10:08:59 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding:from; b=WE4WIxlHJV3AZp8vO0OC6olfXcyhASp7fDIMXdgmLCBDeLrmtwIF2ELkvKAzCR2GpJywJ3aFOy5IF8MQScmuf5DedhIHGowX1aauAmTwD4VaoGsDztjmQ1jw17YiRIb7blFrBwQ38AS4pmQ4r9ow5uHGP456ysrKFeCDYrjJ37s= Message-ID: <45F02697.1070900@googlemail.com> Date: Thu, 08 Mar 2007 16:07:03 +0100 User-Agent: Thunderbird 1.5.0.9 (X11/20070212) MIME-Version: 1.0 To: Andrew Morton CC: Dave Hansen , Michal Piotrowski , "Siddha, Suresh B" , linux-kernel@vger.kernel.org, Ingo Molnar , Thomas Gleixner , Nick Piggin Subject: Re: 2.6.21-rc2-mm2 hang References: <20070306004408.d3f6434d.akpm@linux-foundation.org> <1173305536.868.8.camel@localhost.localdomain> <20070307221628.GD26473@linux-os.sc.intel.com> <1173308841.868.14.camel@localhost.localdomain> <20070307151658.bfcd90e1.akpm@linux-foundation.org> In-Reply-To: <20070307151658.bfcd90e1.akpm@linux-foundation.org> X-Enigmail-Version: 0.94.1.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Michal Piotrowski Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton napisał(a): > On Wed, 07 Mar 2007 15:07:21 -0800 > Dave Hansen wrote: > >> On Wed, 2007-03-07 at 14:16 -0800, Siddha, Suresh B wrote: >>> On Wed, Mar 07, 2007 at 02:12:16PM -0800, Dave Hansen wrote: >>>> I'm seeing weird hangs running ltp on 2.6.21-rc2-mm2. It manifests >>>> itself by the waitpid06 test in LTP hanging. This is very, very >>>> reproducible in about 5 seconds by adding '-s wait' to the ltp command >>>> line. >>>> >>>> I see 4 waitpid06 processes on my 4-way machine spinning in userspace. >>>> But, the weird part is that I can't ssh in once this happens, but I can >>>> log in to the console. I've bisected it down to: >>>> >>>> sched-fix-idle-load-balancing-in-softirqd-context >>> This sounds like an issue in merge we recently had and 2.6.21-rc2-mm2 already >>> has a fix for this. >>> >>> sched-fix-idle-load-balancing-in-softirqd-context-fix.patch >>> >>> Can you please apply both >>> sched-fix-idle-load-balancing-in-softirqd-context >>> sched-fix-idle-load-balancing-in-softirqd-context-fix.patch >>> and see if you still see this problem? >> I was confused that I couldn't find this fix in my patches directory, >> but I double-checked, and realized that I was still on 2.6.21-rc2-mm1. >> I must have grabbed the wrong broken-out tarball when I started the >> bisect. Darn. >> >> Anyway, 2.6.21-rc2-mm2 appears to be OK. Sorry for the false alarm. >> > > Ah, OK. I'll undrop those three patches. > > Michal, did rc2-mm2 make that weird hang go away for you? > No, it works fine for me since -rc2-mm2. Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (PL) (http://www.stardust.webpages.pl/ltg/) LTG - Linux Testers Group (EN) (http://www.stardust.webpages.pl/linux_testers_group_en/)