QEMU/KVM reboot after loading from statefile

QEMU/KVM reboot after loading from statefile

[Lukasz Lempart]

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Hi,

I am having a problem with starting qemu/kvm from a previously saved
statefile. qemu/kvm starts and the console output is the same as when I
initially stopped the vm and saved state. However, after a 'cont' the guest
reboots (i.e. takes me back to the grub menu).

The specs for my setup are as follows:

kvm version: 55 (same issue with 52, and when attempted with 44 instead of
going back to the grub screen the vm would just freeze)

host cpu model: Intel Core 2 Quad
host kernel: 2.6.22.9-61.fc6
host kernel arch: x86_64

guest OS: Linux
guest kernel: 2.6.21-1.3194.fc7
guest bitness: 64

command line: qemu-system-x86_64 -hda vdisk.img -m 384
                      qemu-system-x86_64 -hda vdisk.img -m 384 -incoming
stdio < user

The first is what I initially use before I have created a statefile while
the second attmpts to load with statefile named "user".

To save a statefile I am issuing the following commands in the monitor:

stop
migrate_set_speed 4095m
migrate "exec:dd of=user"

And when I run with the statefile the only command executed in the monitor
is:

cont

Is this a known bug, or am I doing somethign wrong (i.e. using an
incompatible kernel version)?
Any help would be greatly appreciated as I am attempting to get this working
for a school project. Please e-mail me at lempart-e94Sedi4moU@public.gmane.org with any
suggestions/solutions to the problem (I am not currently a member of the
mailing list).

Thank you in advance for all your help.

Lukasz Lempart

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Re: QEMU/KVM reboot after loading from statefile

[Uri Lublin]

Lukasz Lempart wrote:
> Hi,
>
> I am having a problem with starting qemu/kvm from a previously saved 
> statefile. qemu/kvm starts and the console output is the same as when 
> I initially stopped the vm and saved state. However, after a 'cont' 
> the guest reboots (i.e. takes me back to the grub menu).
>
> The specs for my setup are as follows:
>
> kvm version: 55 (same issue with 52, and when attempted with 44 
> instead of going back to the grub screen the vm would just freeze)
>
> Is this a known bug, or am I doing somethign wrong (i.e. using an 
> incompatible kernel version)?
> Any help would be greatly appreciated as I am attempting to get this 
> working for a school project. Please e-mail me at lempart-e94Sedi4moU@public.gmane.org 
> <mailto:lempart-e94Sedi4moU@public.gmane.org> with any suggestions/solutions to the 
> problem (I am not currently a member of the mailing list).
>
> Thank you in advance for all your help.
>
> Lukasz Lempart
It is a known bug.  Migration is currently broken. I'm working on it.


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Re: QEMU/KVM reboot after loading from statefile

[Lukasz Lempart]

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On Dec 6, 2007 5:13 AM, Uri Lublin <uril-atKUWr5tajBWk0Htik3J/w@public.gmane.org> wrote:

> Lukasz Lempart wrote:
> > Hi,
> >
> > I am having a problem with starting qemu/kvm from a previously saved
> > statefile. qemu/kvm starts and the console output is the same as when
> > I initially stopped the vm and saved state. However, after a 'cont'
> > the guest reboots (i.e. takes me back to the grub menu).
> >
> > The specs for my setup are as follows:
> >
> > kvm version: 55 (same issue with 52, and when attempted with 44
> > instead of going back to the grub screen the vm would just freeze)
> >
> > Is this a known bug, or am I doing somethign wrong (i.e. using an
> > incompatible kernel version)?
> > Any help would be greatly appreciated as I am attempting to get this
> > working for a school project. Please e-mail me at lempart-e94Sedi4moU@public.gmane.org
> > <mailto:lempart-e94Sedi4moU@public.gmane.org> with any suggestions/solutions to the
> > problem (I am not currently a member of the mailing list).
> >
> > Thank you in advance for all your help.
> >
> > Lukasz Lempart
> It is a known bug.  Migration is currently broken. I'm working on it.
>

Thank you very much.

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