On Feb 2, 2012, at 12:31 PM, Richard Kojedzinszky wrote:

> Dear users,
> I am trying to compare the 8.2 i386 PV mode and 9.0 amd64 hvm mode, regarding
> $ xm shutdown
> from outside.
> While 8.2 PV shuts down well, 9.0 hvm does not. Is it an issue of the xen 
> hypervisor, or of freebsd?
> What experience do others have?

If you are using a FreeBSD amd64 kernel with Xen PV drivers installed, shutdown 
behavior is controlled
by the PV "control" driver.  This driver notices updates to the 
"control/shutdown" node in the XenStore and
is supposed to act accordingly.  For a reboot or power off event, it simply 
shutdown_nice(RB_POWEROFF|RB_HALT), or shutdown_nice(0) as appropriate.  If you 
can capture the
value of the shutdown node in the XenStore, it should be pretty easy to debug 

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