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Re: [Xen-devel] [PATCH 0 of 5] xl shutdown compatibility with xm

Monday, October 15, 2012, 12:37:57 PM, you wrote:

> On Mon, 2012-10-15 at 11:32 +0100, Sander Eikelenboom wrote:
>> Hi Ian,
>> Great thanks !
>> Only thing i was wondering about:
>> Shouldn't the "-F" option be dropped in favour of always trying the
>> "acpi fallback" when the pv shutdown fails.
>> This because the shutdown scripts still don't work for domains without
>> pv shutdown and i don't see a down side to just trying that as
>> fallback.

> It is guess OS dependent what the ACPI button press event does, it can
> reboot, shutdown or hibernate etc depending on the OS type and its
> configuration. (in theory I suppose it is completely arbitrary e.g. it
> could be configured to eject the CD-ROM or something equally random).

> Therefore the user needs to be aware of when they can safely use it.

Well yes and no:
    - can't remember having (to make) that choice with xm ?
    - On shutdown with xl as toolstack and when the guest doesn't support pv 
shutdown, the init.d/xendomains script doesn't even attempt to shutdown this 
guest by acpi fallback.
    - As a result when using xl as toolstack, the guest is terminated non 
gracefully when the whole machine finally shutsdown, which seems less desirable 
then at least *trying* to shut it down gracefully by using the acpi button.

> Ian.

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