Re: [Xen-devel] [Xen-users] substantial shutdown delay for PV guests with PCI -passthrough

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Sat, Apr 19, 2014 at 7:59 PM, Atom2 <ariel.atom2@xxxxxxxxxx> wrote:
> Hi Konrad,
> thanks for your quick reply. I have re-added the other recipients that were
> in the list prior to my reply from 2 April as I just saw that I somehow have
> managed to drop those guys - which might also explain their silence to my
> reply.
> All: sorry for dropping you from my earlier reply. For your convenience I
> have added my reply from 2 April at the end of this mail.
>
> Am 19.04.14 02:12, schrieb Konrad Rzeszutek Wilk:
>
>> On Fri, Apr 18, 2014 at 11:47:46PM +0200, Atom2 wrote:
>>>
>>> This is just a (very) gentle ping ... or have I missed out on a reply?
>>
>>
>> I ran an PV guest with PCI passthrough this week and it had no trouble -
>> didn't see 10 seconds or so. But I did the shutdown from within the
>> guest (poweroff).
>
> For me it makes no difference timewise whether I issue a
>         xl shutdown guest
> from dom0 or whether I issue
>         shutdown -h now
> from a connection (i.e. ssh or screen or console) to the guest. The main
> difference being that for the latter the delay is visible whereas for the
> former, the delay is not so obvious because 'xl shutdown guest' from dom0
> due to its asynchronous nature returns immediately even when the guest is
> still alive.
>
> One difference that I have noticed however is that for the shutdown from
> _within_ the guest (i.e. shutdown -h now) the state of the guest remains 's'
> in 'xl list' from the time the "system halted" message appears on screen
> until the prompt returns in dom0 whereas for a shutdown from dom0 with 'xl
> shutdown guest' the state changes from 's' to 'ps' for a number of seconds
> before it is finally gone.

Does it look anything like this?

marc.info/?i=<CAFLBxZbOdU=uSwNBVRTB7_7yhPyRShda0asSOvv9J+xfoGxRnA@xxxxxxxxxxxxxx>

(the log in question is /var/log/xen/xl-$DOMAINNAME.log)

 -George

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