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

[Atom2 <ariel.atom2@web2web.at>]

Am 22.04.14 12:44, schrieb George Dunlap:
> On Sat, Apr 19, 2014 at 7:59 PM, Atom2 <ariel.atom2@web2web.at> wrote:
>> Am 19.04.14 02:12, schrieb Konrad Rzeszutek Wilk:
>>> 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@mail.gmail.com>
>
> (the log in question is /var/log/xen/xl-$DOMAINNAME.log)
>
>   -George
Not really (unless there's a specific command line option required to 
get your output) - at least to my eye the messages in my log file look 
rather different:
_______________________________________________________________________
Waiting for domain voip (domid 3) to die [pid 2274]
Domain 3 has shut down, reason code 0 0x0
Action for shutdown reason code 0 is destroy
Domain 3 needs to be cleaned up: destroying the domain
libxl: error: libxl_pci.c:1250:do_pci_remove: xc_domain_irq_permission 
irq=17
libxl: error: libxl_device.c:1134:libxl__wait_for_backend_deprecated: 
Backend /local/domain/0/backend/pci/3/0 not ready (state 7)
libxl: error: libxl_device.c:1138:libxl__wait_for_backend_deprecated: FE 
/local/domain/3/device/pci/0 state 6
libxl: error: libxl_pci.c:1250:do_pci_remove: xc_domain_irq_permission 
irq=16
libxl: error: libxl_device.c:1134:libxl__wait_for_backend_deprecated: 
Backend /local/domain/0/backend/pci/3/0 not ready (state 7)
libxl: error: libxl_device.c:1138:libxl__wait_for_backend_deprecated: FE 
/local/domain/3/device/pci/0 state 6
libxl: error: libxl_pci.c:1250:do_pci_remove: xc_domain_irq_permission 
irq=23
libxl: error: libxl_device.c:1134:libxl__wait_for_backend_deprecated: 
Backend /local/domain/0/backend/pci/3/0 not ready (state 7)
libxl: error: libxl_device.c:1138:libxl__wait_for_backend_deprecated: FE 
/local/domain/3/device/pci/0 state 6
libxl: error: libxl_device.c:894:device_backend_callback: unable to 
remove device with path /local/domain/0/backend/pci/3/0
libxl: error: libxl.c:1452:devices_destroy_cb: libxl__devices_destroy 
failed for 3
Done. Exiting now


Please note: some of my messages may be the result of Ian Jackson's 
(debug) patches which are still active in my environment.

Thanks Atom2