From mboxrd@z Thu Jan 1 00:00:00 1970 From: david ahern Subject: Re: soft lockup in kvm_flush_remote_tlbs Date: Thu, 25 Oct 2007 17:05:00 -0600 Message-ID: <4721211C.7020701@cisco.com> References: <471FCEA6.6000903@cisco.com> <47203BEB.9070509@qumranet.com> <47209A77.3090503@cisco.com> <47209E23.8080808@qumranet.com> <4720E19B.20802@cisco.com> <4720E1EB.6020700@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Avi Kivity Return-path: In-Reply-To: <4720E1EB.6020700-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org It appears to be a problem with the kernel proper (ie., not a Red Hat patch). I hit the soft lockup problem with kvm-48 and the 2.6.18.4 kernel which is the base for RHEL5. That suggests a delivery between 2.6.18.4 (November 2006) and 2.6.23.1 fixed it. david Avi Kivity wrote: > david ahern wrote: >> The issue appears to be with the RHEL5 kernel (host OS is rhel5). I tried your suggestions below -- no effect; still hit the softlockup. >> >> I then moved the host to the 2.6.23.1 kernel but with the kvm-48 code base. Surprisingly, I had no issues starting my guest with '-smp 4'. >> >> > > Well, I regularly start up 4-way Linux guests on 2.6.bleeding.edge. I'd > like to clear that problem for users on older kernels, though. > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/