From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [ANNOUNCE] kvm-46 release Date: Sat, 13 Oct 2007 09:18:40 +0200 Message-ID: <47107150.3000106@qumranet.com> References: <470C8D28.2060408@qumranet.com> <470CB672.4070209@bppiac.hu> <470CB75E.4000404@qumranet.com> <470CB91A.1020508@bppiac.hu> <470CBE58.3040807@qumranet.com> <470CCA61.3080007@bppiac.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel To: Farkas Levente Return-path: In-Reply-To: <470CCA61.3080007-lWVWdrzSO4GHXe+LvDLADg@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 Farkas Levente wrote: > Avi Kivity wrote: > >> Farkas Levente wrote: >> >>>>> we did a quick test against this version and it's turn out the smp >>>>> guests are still not working. even if we start only one linux guest >>>>> with >>>>> 4cpu on 4cpu host the guest kernel hangs at random stages of the kernel >>>>> loading process (if we run more smp guests then they hang earlier, but >>>>> different random stage), but it's never reach the end of the kernel so >>>>> hang somewhere inside the kernel. and the cpu usage of these process >>>>> goes up to until the qemu-kvm processes eat all cpus (ie. 100%). t >>>>> >>>>> >>>> What host cpu are you using? What guest kernel version? 32-bit or >>>> 64-bit? >>>> >>>> I have no problems running a 4-way Linux guest here. >>>> >>>> >>> - host: >>> - Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz >>> - Intel S3000AHV >>> - 8GB RAM >>> - CentOS-5 >>> - kernel-2.6.18-8.1.14.el5 x86_64 64bit >>> - guest-1: >>> - CentOS-5 >>> - kernel-2.6.18-8.1.14.el5 i386 32bit >>> - guest-2: >>> - CentOS-5 >>> - kernel-2.6.18-8.1.14.el5 x86_64 64bit >>> - guest-3: >>> - Mandrake-9 >>> - kernel-2.4.19.16mdk-1-1mdk 32bit >>> - guest-4: >>> - Windows XP Professional 32bit >>> >>> start the first guest-1 with 4cpu produce the above hang. (and of course >>> using kvm-46:-) >>> >>> >>> >> Is it the only guest that hangs with -smp 4? Or all of them? >> > > if i start this guest alone it's hang. if i start all guest-{1,2,3,4} > than all linux guest hangs expect windows which runs but see only one > cpu. ok now i try it for you:-) so: > > - host + guest-1 -> hang > > - host + guest-2 -> hang > in this case i've got a stack trace too on the host, and the host > working 2 more minutes (!?) so i see the top part of the stack > (shift-pageup) but when i try to take a picture the host crash and i can > only see the end:-( but next time i bale to catch it: > ----------------------------------------------- > BUG: soft lockup detected on CPU#0! > Yunfeng reports that this has been fixed, can you try the latest snapshot from http://people.qumranet.com/avi/snapshots/? -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- 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/