From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2993101AbXDSBnj (ORCPT ); Wed, 18 Apr 2007 21:43:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2993104AbXDSBni (ORCPT ); Wed, 18 Apr 2007 21:43:38 -0400 Received: from nigel.suspend2.net ([203.171.70.205]:36020 "EHLO nigel.suspend2.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2993101AbXDSBni (ORCPT ); Wed, 18 Apr 2007 21:43:38 -0400 Subject: Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy From: Nigel Cunningham Reply-To: nigel@nigel.suspend2.net To: Bob Picco Cc: Ingo Molnar , Nick Piggin , Mike Galbraith , linux-kernel@vger.kernel.org, Con Kolivas , suspend2-devel@lists.suspend2.net, Andrew Morton , Linus Torvalds , Thomas Gleixner , Arjan van de Ven In-Reply-To: <20070418225652.GC10564@localhost> References: <20070413202100.GA9957@elte.hu> <200704182245.24156.mail@earthworm.de> <20070418211632.GA7610@elte.hu> <200704182357.28107.mail@earthworm.de> <20070418220228.GA14536@elte.hu> <20070418225652.GC10564@localhost> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-rVlqgdJFf2JrTDgoQ/hO" Date: Thu, 19 Apr 2007 11:43:35 +1000 Message-Id: <1176947015.5906.17.camel@nigel.suspend2.net> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-rVlqgdJFf2JrTDgoQ/hO Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi. On Wed, 2007-04-18 at 18:56 -0400, Bob Picco wrote: > Ingo Molnar wrote: [Wed Apr 18 2007, 06:02:28PM EDT] > >=20 > > * Christian Hesse wrote: > >=20 > > > > although probably your suspend2 problem is still not fixed, it's=20 > > > > worth a try nevertheless. Which suspend2 patch did you apply, and=20 > > > > was it against -rc6 or -rc7? > > >=20 > > > You are right again. ;-) > > >=20 > > > Linux 2.6.21-rc7 > > > Suspend2 2.2.9.11 (applies cleanly to -rc7) > > > CFS v3 (without any additional patches) > > >=20 > > > And it still hangs on suspend. > >=20 > > what's the easiest way for me to try suspend2? Apply the patch, reboot=20 > > into the kernel, then execute what command to suspend? (there's a=20 > > confusing mismash of initiators of all the suspend variants. Can i driv= e=20 > > this by echoing to /sys/power/state?) > >=20 > > Ingo > I had hoped to collect more data with CFS V2. It crashes in > scale_nice_down for s2ram when attempting to disable_nonboot_cpus.=20 > So part of traceback looks like (typed by hand with obvious omissions): >=20 > scale_nice_down > update_stats_wait_end - not shown in traceback because inlined > pick_next_task_fair > migration_call > task_rq_lock > notifier_call_chain > _cpu_down > disable_nonboot_cpus > ... >=20 > This is standard -rc7 with V2 CFS applied. It could be a completely > unrelated issue. I'll attempt to debug further tomorrow. That - and Christian's other reply with the jpg - look to me more like this is an interaction between CFS and cpu hotplugging than Suspend2 itself. Can you also reproduce this with swsusp? Regards, Nigel --=-rVlqgdJFf2JrTDgoQ/hO Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBGJslHN0y+n1M3mo0RAs+jAJ4qHQhc1VSW23u98iYlQTGt5Vyw1gCgsd7U G4HwRK8wB0FqR1BHa59fGXY= =OU9E -----END PGP SIGNATURE----- --=-rVlqgdJFf2JrTDgoQ/hO--