Re: [Xen-devel] pv 2.6.31 (kernel.org) and save/migrate fails, domU BUG

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2009-11-23 at 16:44 +0000, Ian Campbell wrote:
> On Tue, 2009-11-10 at 10:08 +0000, Pasi Kärkkäinen wrote:
> > Hello,
> > 
> > Jeremy: Here's summary about these save/restore problems
> > using upstream Linux 2.6.31.5 PV guest.
> > 
> > For me:
> >     - I can "xm save" + "xm restore" UP guest, but I get non-fatal
> >       BUG in the guest kernel, see [1].
> >     - "xm save" fails for SMP guest with "failed to get the suspend evtchn 
> > port", see [2].
> > 
> > For Dan:
> >     - "xm save" works for UP guest, but "xm restore" doesn't, giving
> >       infinite xen_sched_clock related dumps in the guest kernel, see [3].
> 
> The runstate fix I sent to the list last week should help with this one.
> 
> >     - "xm save" for SMP guest fails, it never ends. I suspect this
> >       is the same problem I'm seeing.
> 
> I'm seeing this (or something very like it) too. At the moment it looks
> as if drivers/xen/manage.c:do_suspend is getting as far as the
> stop_machine() call but I am never seeing to the xen_suspend() callback.

See "xen: register timer interrupt with IRQF_TIMER" that I just sent to
the list for the fix.

Ian.



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