Re: [Xen-users] GPL PV drivers for Windows 0.9.11-pre12

["keith coleman" <keith@xxxxxxxxxxx>]

On Wed, Aug 27, 2008 at 12:24 AM, James Harper
<james.harper@xxxxxxxxxxxxxxxx> wrote:
>> On Thu, Aug 21, 2008 at 8:59 PM, James Harper
>> <james.harper@xxxxxxxxxxxxxxxx> wrote:
>> >>
>> >> Win2003 32bit live migrations don't work for me. They were mostly
>> >> working with 0.9.11-pre9 but the xm migrate command hangs with
>> >> 0.9.11-pre12. The domU is paused on the destination machine and the
>> >> migrating-domU is still running on the source machine.
>> >>
>> >> Live migrations succeed when I revert to non-GPLPV mode so I don't
>> >> think my setup is the problem.
>> >>
>> >
>> > Yes, I probably broke it when I fixed the bugs in the network code.
> I'll
>> > look at it next.
>> >
>>
>> Same behavior in 0.9.11-pre13.
>
> Hmmm... as I don't have the hardware to test live migrations the best I
> can do to approximate it is to do a save then a restore, which I have
> tested pretty thoroughly on a 4 way SMP system.

I just tried a regular save and was not successful. The domU changes
to migrating-domU but continues to run. The save file only grows to
1473 bytes. Here's the output of xend.log:
[2008-08-27 05:59:26 19958] INFO (XendDomain:1165) Domain winserver
(24) unpaused.
[2008-08-27 06:01:17 19958] DEBUG (XendCheckpoint:89) [xc_save]:
/usr/lib64/xen/bin/xc_save 5 24 0 0 4
[2008-08-27 06:01:17 19958] DEBUG (XendCheckpoint:336) suspend
[2008-08-27 06:01:17 19958] DEBUG (XendCheckpoint:92) In
saveInputHandler suspend
[2008-08-27 06:01:17 19958] DEBUG (XendCheckpoint:94) Suspending 24 ...
[2008-08-27 06:01:17 19958] DEBUG (XendDomainInfo:467)
XendDomainInfo.shutdown(suspend)
[2008-08-27 06:01:17 19958] DEBUG (XendDomainInfo:1111)
XendDomainInfo.handleShutdownWatch

>
> When you say 'live migration', is this with 'xm migrate -l'? Did you try
> it without the -l? the non-live migration is probably closer to the
> save+restore that I've been testing.

Yes, I've been trying "--live" migration. Here's the output of xend.log:
[2008-08-27 06:33:16 19958] DEBUG (DevController:150) Waiting for devices vtpm.
[2008-08-27 06:33:16 19958] INFO (XendDomain:1165) Domain winserver
(30) unpaused.
[2008-08-27 06:34:13 19958] DEBUG (XendCheckpoint:89) [xc_save]:
/usr/lib64/xen/bin/xc_save 5 30 0 0 5
[2008-08-27 06:34:24 19958] INFO (XendCheckpoint:365) Saving memory
pages: iter 1  95%^M 1: sent 982159, skipped 849, delta 10959ms, dom0
84%, target 83%, sent 2936Mb/s, dirtied 3Mb/s 1041 pages
[2008-08-27 06:34:24 19958] INFO (XendCheckpoint:365) Saving memory
pages: iter 2   0%^M 2: sent 1006, skipped 35, delta 78ms, dom0 93%,
target 51%, sent 422Mb/s, dirtied 52Mb/s 124 pages
[2008-08-27 06:34:24 19958] INFO (XendCheckpoint:365) Saving memory
pages: iter 3   0%^M 3: sent 112, skipped 11, delta 32ms, dom0 31%,
target 71%, sent 114Mb/s, dirtied 17Mb/s 17 pages
[2008-08-27 06:34:25 19958] INFO (XendCheckpoint:365) Saving memory
pages: iter 4   0%^M 4: sent 15, skipped 2, Start last iteration
[2008-08-27 06:34:25 19958] DEBUG (XendCheckpoint:336) suspend
[2008-08-27 06:34:25 19958] DEBUG (XendCheckpoint:92) In
saveInputHandler suspend
[2008-08-27 06:34:25 19958] DEBUG (XendCheckpoint:94) Suspending 30 ...
[2008-08-27 06:34:25 19958] DEBUG (XendDomainInfo:467)
XendDomainInfo.shutdown(suspend)
[2008-08-27 06:34:25 19958] DEBUG (XendDomainInfo:1111)
XendDomainInfo.handleShutdownWatch


Non-live migration also failed. The domU continues to run and xend.log shows:
[2008-08-27 06:20:56 19958] DEBUG (DevController:150) Waiting for devices vtpm.
[2008-08-27 06:22:12 19958] DEBUG (XendCheckpoint:89) [xc_save]:
/usr/lib64/xen/bin/xc_save 5 27 0 0 4
[2008-08-27 06:22:12 19958] DEBUG (XendCheckpoint:336) suspend
[2008-08-27 06:22:12 19958] DEBUG (XendCheckpoint:92) In
saveInputHandler suspend
[2008-08-27 06:22:12 19958] DEBUG (XendCheckpoint:94) Suspending 27 ...
[2008-08-27 06:22:12 19958] DEBUG (XendDomainInfo:467)
XendDomainInfo.shutdown(suspend)
[2008-08-27 06:22:12 19958] DEBUG (XendDomainInfo:1111)
XendDomainInfo.handleShutdownWatch


When I reboot the domU into non-gplpv mode things work properly.

>
> If you can run the debugger on the source machine you might be able to
> spot something, but there is some hang detection code in there that
> fails when running under the debugger - for some reason when the
> debugger is attached and code is executing at HIGH_LEVEL, it slows to a
> crawl. If you are willing to test it I could send you a version of
> xenpci.sys with that code removed.

Sure.

>
> James
>

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