Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755724Ab2HGRw4 (ORCPT ); Tue, 7 Aug 2012 13:52:56 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:47414 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751184Ab2HGRwz (ORCPT ); Tue, 7 Aug 2012 13:52:55 -0400 Date: Tue, 7 Aug 2012 22:29:32 +0530 From: Srikar Dronamraju To: John Stultz Cc: Peter Zijlstra , "Paul E. McKenney" , LKML Subject: Re: rcu stalls seen with numasched_v2 patches applied. Message-ID: <20120807165932.GA3850@linux.vnet.ibm.com> Reply-To: Srikar Dronamraju References: <20120807123305.GA7137@linux.vnet.ibm.com> <50214BA3.8030909@us.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <50214BA3.8030909@us.ibm.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12080717-8974-0000-0000-00000BEB5CD3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1277 Lines: 36 * John Stultz [2012-08-07 10:08:51]: > On 08/07/2012 05:33 AM, Srikar Dronamraju wrote: > >Hi, > > > >I saw this while I was running the 2nd August -tip kernel + Peter's > >numasched patches. > > > >Top showed load average to be 240, there was one cpu (cpu 7) which > >showed 100% while all other cpus were idle. The system showed some > >sluggishness. Before I saw this I ran Andrea's autonuma benchmark couple > >of times. > > > >I am not sure if this is an already reported issue/known issue. > So Ingo pushed a fix the other day that might address this: > http://git.linaro.org/gitweb?p=people/jstultz/linux.git;a=commitdiff_plain;h=1d17d17484d40f2d5b35c79518597a2b25296996 Okay, will update after applying the patch. > > But do let me know any reproduction details if you can trigger this > again. If you do trigger it again without that patch, watch to see > if the time value from date is running much faster then it should. > The time value from date is normal -- Thanks and Regards Srikar -- 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/