Re: [Xen-devel] live migrating hvm from 4.4 to 4.7 fails in ioreq server

[Olaf Hering <olaf@xxxxxxxxx>]

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.


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

Olaf

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