Re: [Qemu-devel] Block Migration and xbzrle

Orit Wasserman
2012-10-02T09:28:38Z

On 10/02/2012 10:33 AM, lieven-lists@dlh.net wrote:
> Orit Wasserman wrote:
>> On 09/16/2012 01:39 PM, Peter Lieven wrote:
>>> Hi,
>>>
>>> I remember that this was broken some time ago and currently with
>>> qemu-kvm 1.2.0 I am still not able to use
>>> block migration plus xbzrle. The migration fails if both are used
>>> together. XBZRLE without block migration works.
>>>
>>> Can someone please advise what is the current expected behaviour?
>> XBZRLE only work on guest memory so it shouldn't be effected by block
>> migration.
>> What is the error you are getting?
>> What command line ?
>
> Meanwhile I can confirm that it happens with and without block migration.
> I I observe 2 errors:
> a)
> qemu: warning: error while loading state section id 2
> load of migration failed
> b)
> the vm does not enter running state after migration.
>
> The command-line:
> /usr/bin/qemu-kvm-1.2.0 -net
> tap,vlan=798,script=no,downscript=no,ifname=tap1 -net
> nic,vlan=798,model=e1000,macaddr=52:54:00:ff:01:15 -drive
> format=host_device,file=/dev/mapper/iqn.2001-05.com.equallogic:0-8a0906-d85f4e007-3f30017ce11505df-ubuntu-tools-hd0,if=virtio,cache=none,aio=native
> -m 4096 -smp 2,sockets=1,cores=2,threads=1 -monitor
> tcp:0:4002,server,nowait -vnc :2 -qmp tcp:0:3002,server,nowait -name
> 'Ubuntu-Tools' -boot order=dc,menu=off -k de -incoming
> tcp:172.21.55.34:5002 -pidfile /var/run/qemu/vm-250.pid -mem-path
> /hugepages -mem-prealloc -rtc base=utc -usb -usbdevice tablet -no-hpet
> -vga cirrus -cpu host,+x2apic,model_id='Intel(R) Xeon(R) CPU
Migration with -cpu host is very problemtic, because the source and destination can
have different cpu resulting in different cpu features.
Does regular migration works with this setup?
Can you try with a different cpu type?
What are the source and destination /proc/cpuinfo output ?

Cheers,
Orit

> L5640 @ 2.27GHz',-tsc
>
> Thanks,
> Peter
>
>>
>> Regards,
>> Orit
>>>
>>> Thanks,
>>> Peter
>>>
>>>
>>
>>
>>
>
>
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