Re: [Qemu-devel] broken backward migration due to commit 461a275 "parallel: adding vmstate for save/restore"

[Igor Mammedov]

On Fri, 19 Dec 2014 13:42:37 +0100
Igor Mammedov <address@hidden> wrote:

> On Fri, 19 Dec 2014 13:02:24 +0100
> Paolo Bonzini <address@hidden> wrote:
> 
> > 
> > 
> > On 19/12/2014 12:32, Igor Mammedov wrote:
> > > There is one more commit that breaks it, this time with subsection
> > > 6c3bff0 "exec: Save CPUState::exception_index field"
> > > 
> > > qemu: warning: error while loading state for instance 0x0 of device 
> > > 'cpu_common'
> > > the same reproducer with -parallel none
> > 
> > Patch sent, thanks.
> > 
> > Paolo
> 
> one more breakage:
> a28fe7e pckbd: adding new fields to vmstate
> 
> source:
> qemu-system-x86_64 -monitor stdio -M pc-i440fx-1.7 -parallel none 
> xpsp3x86.qcow2
> 
> switch to text screen where you could select Safe Mode and stop/migrate at 
> this point

one more issue if you continue normal boot and wait till XP is booted and then 
migrate
the target will error out with:

qemu: warning: error while loading state for instance 0x0 of device 'serial'

> 
> target:
> qemu-system-x86_64-1.7 -monitor stdio -M pc-i440fx-1.7 -incoming "exec: gzip 
> -c -d STATEFILE.gz" xpsp3x86.qcow2
> 
> qemu: warning: error while loading state for instance 0x0 of device 'pckbd'
>