Re: [Xen-users] Dom0 crashes when Linux DomU started with WIN 2008 R2 DomU already up

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On 13/06/13 16:56, Christophe Baegert wrote:
> Hi,
> 
> I installed several Linux guests on a Xen 4.1  (4.1.4-3+deb7u1 exacty)
> with XL toolstack, on Debian Wheezy, on a 2x8 cores Opteron server
> (mainboard Supermicro H8DGU-F with latest Bios 3.0b).
> 
> It worked fine with these guests for several weeks. Then I tried to
> install a Windows 2008 R2 Standard SP1 guest with HVM. The install
> begins fine, it copies the files, then reboots, then finishes the
> installation, then reboots again, and then, instead of the normal setup
> interface, it hangs for a last 10 minutes, with no VNC output, no Xen
> state reported, after that it displays indefinitely an horizontal moving
> ray of light (see http://pixoa.net/win2008.jpg).
> 
> If I try to launch the other Linux DomU at this moment, after 3 or 5
> seconds, the physical server reboots, without any information.
> 
> Even with safe mode, my Win guest can't finish the boot. It stops after
> loading drivers.
> 
> I don't know if there are 2 problems (windows hang + physical reboot),
> or if the reason of these 2 problems is common.
> 
> I already try to disable C1E in the BIOS. My clocksource is "xen". I see
> NOTHING in the logs, nor when Windows hang, nor when the Dom0 reboots of
> course. I already worked for 2 full days on this problem, but now I'm stuck.
> 
> Any idea ?

Hello,

I guess you already have a serial cable connected to the server, and you
see no output there before the reboot?

Could you try to install latest Xen from the unstable repository?

http://xenbits.xen.org/gitweb/?p=xen.git;a=summary

Or at least recompile your version of Xen with debugging enabled? (I
guess the version shipped on Debian doesn't come with debugging
enabled). Also add "noreboot=true" to the Xen boot parameters, so the
hypervisor doesn't automatically reboot.


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