Re: live migrating hvm from 4.4 to 4.7 fails in ioreq server

[Paul Durrant <Paul.Durrant@citrix.com>]

> -----Original Message-----
> From: Olaf Hering [mailto:olaf@aepfle.de]
> Sent: 29 July 2016 14:11
> To: Paul Durrant
> Cc: Stefano Stabellini; Wei Liu; Andrew Cooper; xen-devel@lists.xen.org;
> Anthony Perard; zhigang.x.wang@oracle.com
> Subject: Re: [Xen-devel] live migrating hvm from 4.4 to 4.7 fails in ioreq
> server
> 
> On Fri, Jul 29, Paul Durrant wrote:
> 
> > >   Could you give the attached patch a try? I believe it should solve the
> > > problem.
> 
> Thanks Paul. I tested it with 4.4.20160610T12110 dom0 as sender and
> 4.6.20160620T12082 as receiver.
> 
> 
> Initially the result was this:
> 
> # cat /var/log/xen/qemu-dm-fv-x64-sles12sp1-clean--incoming.log
> char device redirected to /dev/pts/3 (label serial0)
> xen: ioreq server create: Cannot allocate memory
> qemu-system-x86_64: xen hardware virtual machine initialisation failed
> 
> 
> Now the result it this:
> root@anonymi:~ # cat /var/log/xen/qemu-dm-fv-x64-sles12sp1-clean--
> incoming.log
> char device redirected to /dev/pts/3 (label serial0)
> xen_ram_alloc: do not alloc f800000 bytes of ram at 0 when runstate is
> INMIGRATE
> xen_ram_alloc: do not alloc 800000 bytes of ram at f800000 when runstate is
> INMIGRATE
> xen_ram_alloc: do not alloc 10000 bytes of ram at 10000000 when runstate is
> INMIGRATE
> xen_ram_alloc: do not alloc 40000 bytes of ram at 10010000 when runstate is
> INMIGRATE
> Unknown savevm section or instance 'kvm-tpr-opt' 0
> qemu-system-i386: load of migration failed: Invalid argument
> 
> So appearently it got past the point of the ioreq server issue.
> 

Yes, it certainly looks like it.

> 
> The "kvm-tpr-opt" thing was briefly discussed on 12 May 2016.
> 

I'll have a look for that.

Thanks,

  Paul

> Olaf
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