From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Graf Subject: KVM guest crashes Date: Tue, 20 Jan 2009 16:49:01 +0100 Message-ID: <4975F26D.707@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Avi Kivity , Marcelo Tosatti , Joerg Roedel , Sheng Yang To: "kvm@vger.kernel.org" Return-path: Received: from ns1.suse.de ([195.135.220.2]:39241 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755870AbZATPtF (ORCPT ); Tue, 20 Jan 2009 10:49:05 -0500 Sender: kvm-owner@vger.kernel.org List-ID: Hi list, recently I've been hitting some KVM bugs others seem to have reported as well, including - CIFS timeouts - Stuck ?? errors - Random segmentation faults in the guest so I figured, I'll put together a stress test that can be used to reproduce these issues. This is done by using a CIFS mount on the host and unpacking data from that mount to the mount. I have been able to bring kvm down to its knees a lot just by doing this. Simply run the test in an endless-loop. FWIW enabling NPT helps triggering the issue. The guest kernels included here are openSUSE 11.0 (2.6.25) and 11.1 (2.6.27) kernels. Find the tests here: http://alex.csgraf.de/kvm-tests.tar.bz2 And some logs here (NPT enabled): http://alex.csgraf.de/kvm-logs.tar.bz2 I'm somewhat lost on the reason for these failures, so if you do have some time on your hands, please give me a hand debugging this! If I'd had to guess, I'd say it's either an APIC issue and/or guest memory corruption. Alex