Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753554Ab0LVPZk (ORCPT ); Wed, 22 Dec 2010 10:25:40 -0500 Received: from casper.infradead.org ([85.118.1.10]:60802 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752760Ab0LVPZj convert rfc822-to-8bit (ORCPT ); Wed, 22 Dec 2010 10:25:39 -0500 Subject: Re: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c From: Peter Zijlstra To: Miklos Vajna Cc: Mike Galbraith , shenghui , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, Greg KH In-Reply-To: <20101222151434.GW10557@genesis.frugalware.org> References: <1277808215.1868.5.camel@laptop> <20101219020313.GJ31750@genesis.frugalware.org> <20101222002248.GP10557@genesis.frugalware.org> <1293006589.2170.41.camel@laptop> <1293007311.11370.172.camel@marge.simson.net> <1293008842.2170.70.camel@laptop> <20101222133154.GS10557@genesis.frugalware.org> <1293026422.2170.136.camel@laptop> <1293027112.2170.140.camel@laptop> <20101222151434.GW10557@genesis.frugalware.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Wed, 22 Dec 2010 16:25:30 +0100 Message-ID: <1293031530.2170.150.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 874 Lines: 20 On Wed, 2010-12-22 at 16:14 +0100, Miklos Vajna wrote: > > qemu -enable-kvm -kernel kernel-build/arch/x86/boot/bzImage -append > "root=/dev/sda1 debug sched_debug ignore_loglevel sysrq_always_enabled > console=ttyS0 init=/bin/systemd" -hda systemd.img -serial stdio -m 1G > -vnc :0 > > ^ Only init=/bin/systemd added, and this results in a panic in most > cases. I'm attaching the stdout of qemu, showing the fail in > put_prev_task_fair. OK, that does seem to work, maybe it really wants the vnc thing, dunno. Anyway, it looks like I need to go build a kernel with kvm in for that machine ;-) Thanks for the effort so far. -- 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/