Just to make sure, you are using PAExen kernel on 12GB RAM Linux? 4GB is max for regular kernel without PAE extensions. Mathew S. McCarrell wrote: > Yeah, the Dom0 should have plenty of memory left since only 2-3 GB of > memory is being used out of 12 GB installed. The out of memory messages > were from the domU that I xm consoled into prior to shutting down that > particular VM because it was out of memory. > > Matt > > -- > Mathew S. McCarrell > Clarkson University '10 > > mccarrms at gmail.com <mailto:mccarrms at gmail.com> > mccarrms at clarkson.edu <mailto:mccarrms at clarkson.edu> > > > On Wed, Apr 29, 2009 at 3:09 PM, Maros Timko <timkom at gmail.com > <mailto:timkom at gmail.com>> wrote: > > Hi Mathew, > > I would say no. Our system has freezed completely, it did not > reboot. Our issue was caused by concurrent access to scheduler > method that created a deadlock. > I can see some out of memory messages, do you still have enough > memory for Dom0? > > 2009/4/29 Mathew S. McCarrell <mccarrms at gmail.com > <mailto:mccarrms at gmail.com>> > > Hey, > > I'm wondering if it is possible that your problem is related to > mine. Earlier today I had to restart one of our domUs on one of > our systems. I used xm shutdown instead of xm destroy and then > did xm list to determine if the domU had shutdown or not. Upon > issuing xm list a second time, the entire server crashed and > rebooted. > > I've checked the logs and have yet to find anything. I've > attached a transcript of the commands as I executed them on the > server. The system is running CentOS 5.3 x64 w/Xen (kernel > 2.6.18-128.1.6.el5xen). > > Any thoughts? > > Thanks, > Matt > > -- > Mathew S. McCarrell > Clarkson University '10 > > mccarrms at gmail.com <mailto:mccarrms at gmail.com> > mccarrms at clarkson.edu <mailto:mccarrms at clarkson.edu> > > > 2009/4/7 Maros Timko <timkom at gmail.com <mailto:timkom at gmail.com>> > > Hi all, > > thanks to all for valuable replies. > It seems like we identified the issue. We assured that it is > not HW related as it was already reproduced on different > machines and platforms, with different BIOS versions. > We are running a system performance/statistics collector > that executes "xentop" command on Dom0 regularly. This is > causing issues. If we execute: > xentop -b -d 0.1 > /dev/null > in multiple instances, it will freeze the system. > It was reproduced on CentOS 5.3 > (kernel-xen-2.6.18-128.1.6.el5) system. > There is created a bug for this issue: > http://bugs.centos.org/view.php?id=3454 > > With regards, > > Tino > > > 2009/4/3 Maros TIMKO <timko at pobox.sk <mailto:timko at pobox.sk>> > > Hi all, > > we are running CentOS 5.2 Xen virtualization system with > the latest CentOS packages with couple of VMs on DELL > PowerEdge. "Sometimes" the whole machine freezes without > anything in log files, anything on the console. > "Sometimes" really means we cannot define why or when. > Sometimes the machine was idle with just one VM, > sometimes quite busy with couple of VMs. > > Has anybody had the same experience? If yes, any hints > on how to resolve it or how to trace the cause? > > > > Thanks. > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org <mailto:CentOS-virt at centos.org> > http://lists.centos.org/mailman/listinfo/centos-virt > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org <mailto:CentOS-virt at centos.org> > http://lists.centos.org/mailman/listinfo/centos-virt > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org <mailto:CentOS-virt at centos.org> > http://lists.centos.org/mailman/listinfo/centos-virt > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org <mailto:CentOS-virt at centos.org> > http://lists.centos.org/mailman/listinfo/centos-virt > > > > ------------------------------------------------------------------------ > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt