From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757404AbaGWDxb (ORCPT ); Tue, 22 Jul 2014 23:53:31 -0400 Received: from darkcity.gna.ch ([195.226.6.51]:49830 "EHLO mail.gna.ch" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756208AbaGWDx2 (ORCPT ); Tue, 22 Jul 2014 23:53:28 -0400 Message-ID: <53CF31AE.30403@daenzer.net> Date: Wed, 23 Jul 2014 12:53:18 +0900 From: =?windows-1252?Q?Michel_D=E4nzer?= User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:31.0) Gecko/20100101 Icedove/31.0 MIME-Version: 1.0 To: Peter Zijlstra CC: Ingo Molnar , linux-kernel@vger.kernel.org, Linus Torvalds Subject: Re: Random panic in load_balance() with 3.16-rc References: <53C77BB8.6030804@daenzer.net> <20140717075820.GE19379@twins.programming.kicks-ass.net> <53C8E90F.1010306@daenzer.net> <53CE00EF.70108@daenzer.net> In-Reply-To: <53CE00EF.70108@daenzer.net> X-Enigmail-Version: 1.6 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5FWoGmOBwGcQXcdIGTfGiPOhhsInrdSmC" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --5FWoGmOBwGcQXcdIGTfGiPOhhsInrdSmC Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 22.07.2014 15:13, Michel D=E4nzer wrote: > On 18.07.2014 18:29, Michel D=E4nzer wrote: >> On 17.07.2014 16:58, Peter Zijlstra wrote: >>> On Thu, Jul 17, 2014 at 04:31:04PM +0900, Michel D=E4nzer wrote: >>>> >>>> I've been running into the panic captured in the attached picture (h= ope >>>> it's legible) randomly while running 3.16-rc4 and -rc5. I haven't >>>> noticed any pattern as to when it happens; at least once it happened= >>>> while the box was basically sitting idle. >>>> >>>> dmesg, .config and /proc/cpuinfo attached as well; let me know if yo= u >>>> need anything else. >>> >>> Does lkml.kernel.org/r/20140716145546.GA6922@wolff.to cure things? >> >> Yes, adding back >> >> cpumask_clear(sched_group_cpus(sg)); >> >> seems to do the trick, thanks. >=20 > I'm afraid it happened again with 3.16-rc5 plus the above change. It > seemed to last longer than before, but maybe that was just luck. >=20 > Going to try 3.16-rc6 now. Just happened again with the same change on top of 3.16-rc6. Are there any other potential fixes yet? I hope this problem is on the radar as a showstopper for 3.16. --=20 Earthling Michel D=E4nzer | http://www.amd.co= m Libre software enthusiast | Mesa and X developer --5FWoGmOBwGcQXcdIGTfGiPOhhsInrdSmC Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iD8DBQFTzzGvWoGvjmrbsgARArgiAJ4mzDSXFAD4x8t0MWsLmOAr95PYIQCgt9C6 J/pTEtVBKAczGPDOqcU0W0E= =jVoQ -----END PGP SIGNATURE----- --5FWoGmOBwGcQXcdIGTfGiPOhhsInrdSmC--