Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755396AbYKCKGG (ORCPT ); Mon, 3 Nov 2008 05:06:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754635AbYKCKFz (ORCPT ); Mon, 3 Nov 2008 05:05:55 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:37969 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754631AbYKCKFy (ORCPT ); Mon, 3 Nov 2008 05:05:54 -0500 Date: Mon, 3 Nov 2008 11:04:59 +0100 From: Ingo Molnar To: Avi Kivity Cc: Andrey Borzenkov , Avi Kivity , mingo@redhat.com, Andrew Morton , "Rafael J. Wysocki" , Linux Kernel Mailing List , Eduardo Habkost , "Eric W. Biederman" Subject: Re: [PATCH] Use BIOS reboot on Toshiba Portege 4000 Message-ID: <20081103100459.GE13671@elte.hu> References: <200810312118.45368.arvidjaar@mail.ru> <20081103090843.GI11730@elte.hu> <490ECC4D.9090704@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <490ECC4D.9090704@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00,DNS_FROM_SECURITYSAGE autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 0.0 DNS_FROM_SECURITYSAGE RBL: Envelope sender in blackholes.securitysage.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1434 Lines: 40 * Avi Kivity wrote: > Ingo Molnar wrote: >>> Subject: [PATCH] Use BIOS reboot on Toshiba Portege 4000 >>> >>> From: Andrey Borzenkov >>> >>> After commit c7ffa6c26277b403920e2255d10df849bd613380 which defaults >>> to reboot via ACPI keyboard is dead on Toshiba Portege 4000 upon reboot. >>> Power off is required to revive it again. Add DMI entry to force BIOS >>> reboot method as it was before. >>> >>> Signed-off-by: Andrey Borzenkov >>> >> >> Avi, i expect more boxes to be affected by this bug, and the DMI >> solution just does not scale. >> >> So could we please disable VMX from the emergency-shutdown code >> instead of twiddling with the reboot method? >> >> Something like this might work as well: iff VMX is enabled, we just do >> smp_send_stop() (instead of skipping it) which should take care of >> this. >> > > There is already some code being worked on for kdump (which suffers > from the same symptoms), only kdump uses NMI IPIs for increased > stopping power. Eduardo, can you take a look at porting it to > emergency reboot? note that this is a must-have regression fix for v2.6.28. Ingo -- 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/