Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation

[Dr. David Alan Gilbert]

* Bharata B Rao (address@hidden) wrote:

> > Where we have iterable, but non-postcopiable devices (e.g. htab
> > or block migration), complete them before forming the 'package'
> > but with the CPUs stopped.  This stops them filling up the package.
> 
> That helps and the migration suceeds now when I switch to postcopy
> immediately after starting the migration.

Excellent.

> However after postcopy migration, when I attempt to start an incoming
> instance again to migrate the guest back, I see this failure:
> 
> qemu-system-ppc64: cannot set up guest memory 'ppc_spapr.ram': Cannot 
> allocate memory
> 
> The same doesn't happen with normal migration.

Huh that's fun; that's the original source guest that's running out of RAM?
It's original QEMU should be gone by that point.

> 
> I will see if I can debug this more tomorrow.

Thanks.

Dave

> 
> Regards,
> Bharata.
> 
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK