From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932277Ab2EJJW3 (ORCPT ); Thu, 10 May 2012 05:22:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:7109 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932196Ab2EJJWV (ORCPT ); Thu, 10 May 2012 05:22:21 -0400 Message-ID: <4FAB88B8.5060203@redhat.com> Date: Thu, 10 May 2012 12:22:00 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Nikunj A Dadhania CC: Andrea Arcangeli , KVM , LKML , Ingo Molnar , Peter Zijlstra Subject: Re: KVM: Softlockups in guests while running kernbench References: <87wr4kjvtk.fsf@abhimanyu.in.ibm.com> In-Reply-To: <87wr4kjvtk.fsf@abhimanyu.in.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/10/2012 11:15 AM, Nikunj A Dadhania wrote: > I am running a 3.4.0-rc4 based kernel(commit: af3a3ab2), guest config > attached. > > During my tests, I saw few softlockups inside the guests while running > kernbench inside the guest. I can reproduce this repeatedly. > > Test Setup: > > - Create 4 VMs (8vcpu, 1GB RAM) > - Run kernbench inside each guests (kernbench -f -M -H -o 16) in parallel > > How overcommitted are you? What does the host hardware look like? Is there any load on the host? The traces themselves always point a couple of instructions after interrupts are enabled. Can you post a few more? -- error compiling committee.c: too many arguments to function