Kevin McKeon
2009-May-20 16:22 UTC
[Xen-users] system reboots half way through virt-install
Hope somebody can help me out here. I''ve been building a bunch of Xen PV DomUs on Dell 2950 SAN attached boxes. I''ve done this a bunch of times using virt-install and it typically works just fine. From time to time, I''ll come across a system that will shutdown about half way into a DomU installation when using ''virt-install''. The installation kicks off just fine but the system eventually reboots without warning. The frustrating thing is nothing significant is written to /var/log/messaages prior to the shutdown. Each time I attempt to run virt-install, the system crashes and not always during the same phase of the install. If I let the box sit idle, it will stay running for days. It only crashes during a DomU install. Thoughts anyone???? Thanks -Kevin _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jeff Lane
2009-May-20 16:51 UTC
Re: [Xen-users] system reboots half way through virt-install
First, what version of Xen and what host OS are you running? That may be important... And not that this helps a lot, but I''ve always found that instantaneous shutdowns like that tend to be either memory or a bad processor... There usually has to be something very very wrong with the OS to actually force a full reboot, unless you have some sort of watchdog looking for a weird error which forces a reboot... but again, most of the ones I have seen like that would throw a weird NMI error and reboot the machine, and usually it was something memory related... BUT it could be something with the host OS or Xen or something xen is doing with memory mapping, perhaps... Just an idea, and I know it''s probably not terribly useful, but I couldnt really say for sure... But check the Xen logs to see what''s going on, and if you have something like kdump on the system, configure and run that, and you''ll at least, hopefully, get a core dump from the kernel that could give you an idea of what''s going on... _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Kevin McKeon
2009-May-21 20:03 UTC
Re: [Xen-users] system reboots half way through virt-install
I found the problem. After a lot of googling, it appears there''s a bug when creating a DomU within a CentOS5.3 Dom0. The solution? If you must use CentOS for your Dom0, just use 5.2. This issue seems to be isolated to the DomU creation process (using virt-install or virt-manager) when running CentOS5.3. You can however build 5.3 DomUs, as long as your Dom0 is NOT CentOS 5.3. regards, kevin On Wed, May 20, 2009 at 12:51 PM, Jeff Lane <dreadpiratejeff@gmail.com>wrote:> First, what version of Xen and what host OS are you running? That may > be important... > > And not that this helps a lot, but I''ve always found that > instantaneous shutdowns like that tend to be either memory or a bad > processor... > > There usually has to be something very very wrong with the OS to > actually force a full reboot, unless you have some sort of watchdog > looking for a weird error which forces a reboot... but again, most of > the ones I have seen like that would throw a weird NMI error and > reboot the machine, and usually it was something memory related... > > BUT it could be something with the host OS or Xen or something xen is > doing with memory mapping, perhaps... > > Just an idea, and I know it''s probably not terribly useful, but I > couldnt really say for sure... > > But check the Xen logs to see what''s going on, and if you have > something like kdump on the system, configure and run that, and you''ll > at least, hopefully, get a core dump from the kernel that could give > you an idea of what''s going on... >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users