Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753101Ab0LVNcD (ORCPT ); Wed, 22 Dec 2010 08:32:03 -0500 Received: from virgo.iok.hu ([212.40.97.103]:59581 "EHLO virgo.iok.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751489Ab0LVNcB (ORCPT ); Wed, 22 Dec 2010 08:32:01 -0500 Date: Wed, 22 Dec 2010 14:31:55 +0100 From: Miklos Vajna To: Peter Zijlstra Cc: Mike Galbraith , shenghui , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, Greg KH Subject: Re: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Message-ID: <20101222133154.GS10557@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> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UlsYxwg8UDQn+EKZ" Content-Disposition: inline In-Reply-To: <1293008842.2170.70.camel@laptop> 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: 2366 Lines: 72 --UlsYxwg8UDQn+EKZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 22, 2010 at 10:07:22AM +0100, Peter Zijlstra wrote: > On Wed, 2010-12-22 at 09:41 +0100, Mike Galbraith wrote: > > On Wed, 2010-12-22 at 09:29 +0100, Peter Zijlstra wrote: > > > On Wed, 2010-12-22 at 01:22 +0100, Miklos Vajna wrote: > > > > Please let me know if you need more info. > > >=20 > > > What distro are you using? it looks like systemd is involved and I'm > > > actively avoiding anything using that crap. First, sorry about the systemd list, I did not know it's subscriber-only. This is Frugalware Linux, and it's disabled by default here as well. > > Heh, gearing up to hunt a bug it triggers, just doing all I had to do to > > get the thing built and installed blew my box _all up_. I still have > > smoldering bits lying about a week later. >=20 > There's a reason I was asking for a qemu image ;-), I'm not letting that > stuff anywhere near my regular machines. Sure - here is a qcow image (871M): http://frugalware.org/~vmiklos/files/systemd.img Here is how I started it: qemu-kvm -vnc :0 -m 1G -hda systemd.img $ qemu-kvm -version QEMU PC emulator version 0.12.3 (qemu-kvm-0.12.3), Copyright (c) 2003-2008 = Fabrice Bellard There are two menu entries in grub config - first is sysvinit, that boots up correctly here, you can login using root / root. The second is systemd, that just panics here almost all the time. In case it would not, use 'systemctl emergency' as root and that will trigger the bug. :) If you need more packages in the virtual machine and the pacman package manager sounds exotic, here is a quick help: http://frugalware.org/docs/pacman-g2#_apt_pacman_g2_cross_reference Thanks, Miklos --UlsYxwg8UDQn+EKZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk0R/coACgkQe81tAgORUJbeNQCfene0h38HZsRYHWavdKPKrjPC UhUAni/5sEqmhHjk0DSTV5ttMWfV0PSa =x5FW -----END PGP SIGNATURE----- --UlsYxwg8UDQn+EKZ-- -- 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/