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Re: [Xen-devel] Early ACPI events prevent subsequent ACPI functionality on xen 4.3 + HVM domU

On 05/21/2013 03:20 PM, Ian Campbell wrote:
On Tue, 2013-05-21 at 15:16 +0100, George Dunlap wrote:
And will the Citrix PV drivers check for the existence of
shutdown commands before they start a watch?

Watches fire immediately when you register them, to allow this race to
be easily avoided without really having to think about it.

Well then that watch mechanism is broken, at least for values written before some point in time:

# xenstore-ls -f /local/domain/10
/local/domain/10/control/shutdown = "poweroff"

But the domain doesn't shut down.

Konrad, sorry to keep sending stuff your way, but I'm not sure who else to bring in for this one. The original thread is here:


But the problem actually has nothing to do with ACPI -- it's the PV shutdown command that is getting lost after the driver registers HVM_PARAM_CALLBACK_IRQ but before something else comes up that starts watching ../control/shutdown.


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