RE: [Xen-devel] xen and reboots

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

Following up to my own post... it looks like in xen/arch/x86/domain.c
there is a variable called 'reboot_mode', which is written to physical
address 0x472 on reboot to tell the BIOS what to do. This would contain
0x1234 to do a 'warm' boot, and 0 (or anything else???) otherwise. But
nowhere in the xen directory can I see this variable get initialised...

Any ideas?

Thanks

James

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of James Harper
> Sent: Friday, 30 December 2005 10:42
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] xen and reboots
> 
> I know I've asked vaguely the same questions before, but when dom0
> reboots, is it dom0 or xen that actually reboots the machine?
> 
> What about when, say, softdog (the software watchdog kernel module)
does
> a reboot?
> 
> I ask because if I say 'reboot', one system I have just hangs, with
the
> monitor in 'standby' mode (eg no signal), whereas if I kill the
watchdog
> daemon (with softdog loaded with nowayout=1), it reboots fine, but
> obviously doesn't do a clean shutdown.
> 
> Is there a way to change the style of reboot that xen uses? Or should
I
> be looking at asking dom0 to reboot differently?
> 
> Thanks
> 
> James
> 
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