From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Questions on the VMentry failure patch Date: Mon, 14 Jul 2008 19:24:08 +0300 Message-ID: <487B7DA8.9070500@qumranet.com> References: <52d4a3890807070707n4e0039ccgc07aa0fa3ab28d8e@mail.gmail.com> <48722720.7050409@qumranet.com> <52d4a3890807070744i66a9db56r787eecc62081c8e8@mail.gmail.com> <48722D99.2030009@qumranet.com> <4872363F.5010103@codemonkey.ws> <52d4a3890807071752g5675558el38bded8bd475c68a@mail.gmail.com> <52d4a3890807091056j1ff4db6fo16cf364dfa8a36de@mail.gmail.com> <52d4a3890807100648n2909eda1h1aeb993ae00aaa18@mail.gmail.com> <52d4a3890807140910v2157fc14p397dd78cc949dc5b@mail.gmail.com> <487B7AF6.2060607@qumranet.com> <487B7B9A.7030907@codemonkey.ws> 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: Anthony Liguori Return-path: Received: from il.qumranet.com ([212.179.150.194]:11819 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753351AbYGNQYJ (ORCPT ); Mon, 14 Jul 2008 12:24:09 -0400 In-Reply-To: <487B7B9A.7030907@codemonkey.ws> Sender: kvm-owner@vger.kernel.org List-ID: Anthony Liguori wrote: >> >> I suspected an interrupt, which fits the scenario you describe. >> Although Anthony tested this and found out interrupts were not >> involved, IIRC. > > It was at least not occurring for me when an interrupt was being > injected. That's not to say that it isn't somehow affected by > interrupt injections but it doesn't appear to be the obvious interrupt > occurs while doing switch_to_pm_20. A good thing to check is whether guest interrupts are enabled at that point. I suspect they aren't. It might be a host interrupt, forcing an exit (and an entry) at a random point, which then fails. -- error compiling committee.c: too many arguments to function