From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: Questions on the VMentry failure patch Date: Mon, 07 Jul 2008 10:26:45 -0500 Message-ID: <487235B5.9080407@codemonkey.ws> References: <52d4a3890807070707n4e0039ccgc07aa0fa3ab28d8e@mail.gmail.com> <48722720.7050409@qumranet.com> <52d4a3890807070744i66a9db56r787eecc62081c8e8@mail.gmail.com> <48722D99.2030009@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Mohammed Gamal , kvm@vger.kernel.org, Rik van Riel , Guillaume Thouvenin To: Avi Kivity Return-path: Received: from rn-out-0910.google.com ([64.233.170.191]:20977 "EHLO rn-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753060AbYGGP1M (ORCPT ); Mon, 7 Jul 2008 11:27:12 -0400 Received: by rn-out-0910.google.com with SMTP id k40so363977rnd.17 for ; Mon, 07 Jul 2008 08:27:11 -0700 (PDT) In-Reply-To: <48722D99.2030009@qumranet.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > Mohammed Gamal wrote: >> On Mon, Jul 7, 2008 at 5:24 PM, Avi Kivity wrote: >> >>> Mohammed Gamal wrote: >>> >>>> Hello, >>>> Guillaume Thouvenin's VMentry failure detection patch was reverted >>>> before because it broke guest rebooting. Although it turned out it >>>> didn't, it was preferred not to re-include it because it was not >>>> reliable enough. Although it is working fine with me, I want to know >>>> why it wasn't re-included? Did it cause any regressions? Is it >>>> preferrable to use an alternative mechanism to detect the VM entry >>>> failure and start real-mode emulation? If yes, What do you think it >>>> should be? >>>> >>>> >>>> >>> Anthony Liguori reported problems with Ubuntu IIRC. I'd like to >>> know that >>> they are fixed, or what exactly the issue was. >>> >>> >> Well, Ubuntu and openSuSE live CDs used to crash occasionally after >> booting, it didn't happen most of the time though. I've never >> experienced this issue after kvm-70 - with the patches the patch >> included of course. Did anyone have any issues with the patches >> included? >> > > I think they're fine. Can you check the vmentry patch now, with > Anthony's testcase? If I revert 0eba1b, then use the following command line: sudo qemu-system-x86_64 -hda ~/images/10gig.img -cdrom ~/images/isos/ubuntu-7.10-server-amd64.iso -snapshot -boot dc After about the 7th or so run, I get: kvm_run: failed entry, reason 5 kvm_run returned -8 So the problem still exists. Regards, Anthony Liguori