From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: KVM: Softlockups in guests while running kernbench Date: Thu, 10 May 2012 12:22:00 +0300 Message-ID: <4FAB88B8.5060203@redhat.com> References: <87wr4kjvtk.fsf@abhimanyu.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Andrea Arcangeli , KVM , LKML , Ingo Molnar , Peter Zijlstra To: Nikunj A Dadhania Return-path: In-Reply-To: <87wr4kjvtk.fsf@abhimanyu.in.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.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