Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934510Ab0GOTRJ (ORCPT ); Thu, 15 Jul 2010 15:17:09 -0400 Received: from mailhost-l2-p1.nerim.net ([195.5.209.46]:49910 "EHLO smtp-delay1.nerim.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934274Ab0GOTRF (ORCPT ); Thu, 15 Jul 2010 15:17:05 -0400 Date: Thu, 15 Jul 2010 21:16:38 +0200 From: Damien Wyart To: Pekka Enberg Cc: Zeno Davatz , Catalin Marinas , linux-kernel@vger.kernel.org, Andrew Morton , x86@kernel.org, mingo@elte.hu, yinghai@kernel.org Subject: Re: kmemleak, cpu usage jump out of nowhere Message-ID: <20100715191638.GA3694@brouette> References: <1279100846.8592.53.camel@e102109-lin.cambridge.arm.com> <4C3D89AC.4040303@cs.helsinki.fi> <1279205891.6664.46.camel@e102109-lin.cambridge.arm.com> <4C3F2F52.2050101@cs.helsinki.fi> <20100715162805.GA10240@brouette> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100715162805.GA10240@brouette> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1216 Lines: 26 > > > I also did not have anymore hangs and random bad moods of my CPUs > > > that all of a sudden grab 100% of all 8 cores of my CPU power across > > > my machine since I disabled > > > CONFIG_NO_BOOTMEM: > * Pekka Enberg [2010-07-15 18:54]: > > Interesting. Damien, does disabling CONFIG_NO_BOOTMEM fix you problem too? > I will test in the coming hours, and report back tomorrow... Just > recompiled 2.6.35-rc5-git1 with this option disabled. For now, I can't reproduce the problem with CONFIG_NO_BOOTMEM disabled ; with the option and rc5 the problem was happening quite quickly after boot and normal use of the machine. So it seems I can confirme what Zeno has seen and I hope this will give a hint to debug the problem. I guess this has not been reported that much because many testers might not have enabled CONFIG_NO_BOOTMEM... Maybe the scheduler folks could test their benchmark with a kernel having this option enabled? -- Damien -- 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/