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

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 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.

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.

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.

James

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