Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753452AbaGQEXd (ORCPT ); Thu, 17 Jul 2014 00:23:33 -0400 Received: from wolff.to ([98.103.208.27]:43078 "HELO wolff.to" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750832AbaGQEXb (ORCPT ); Thu, 17 Jul 2014 00:23:31 -0400 Date: Wed, 16 Jul 2014 23:21:59 -0500 From: Bruno Wolff III To: Dietmar Eggemann Cc: Josh Boyer , "mingo@redhat.com" , "peterz@infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c Message-ID: <20140717042159.GA26711@wolff.to> References: <20140716145546.GA6922@wolff.to> <20140716151748.GC2460@hansolo.jdub.homelinux.org> <53C6CFCC.2050300@arm.com> <20140716195414.GA16401@wolff.to> <53C7084C.7090104@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <53C7084C.7090104@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>>Could you also put the two BUG_ON lines into build_sched_groups() >>>[kernel/sched/core.c] wo/ the cpumask_clear() and setting >>>sg->sgc->capacity to 0 and share the possible crash output as well? >> >>I can try a new build with this. I can probably get results back tomorrow >>before I leave for work. The crashes happen too early in the boot process >>for me to easily capture output as text. I can slow things down to take >>pictures though. >> > >That would be helpful. Thanks. I saw that you have CONFIG_SCHED_DEBUG >enabled. Well that didn't help much. It still crashed. Taking pictures didn't get a good capture. I wasn't able to use boot_delay to slow things down, as even a small value resulted in me only seeing one line of output before giving up after a minute or two. I used a serial console to slow things down, but it isn't enough to make it easy to take pictures with the camera I had. The crash was someplace inside the scheduler, but I don't know if there were messages from the BUG_ON lines. -- 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/