Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration

[Paolo Bonzini]

Il 04/08/2014 18:30, Marcin Gibuła ha scritto:
> 
> 
> is this analysis deep enough for you? I don't know if that can be fixed
> with existing api as cpu_synchronize_all_states() is all or nothing kind
> of stuff.
> 
> Kvmclock needs it only to read current cpu registers, so syncing
> everything is not really necessary. Perhaps exporting one of
> kvm_arch_get_* would be enough. And it wouldn't mess with lazy get/put.
> 
> On the other hand, if in future any other driver adds
> cpu_synchronize_all_states() in its change state callback it could
> result in same error so perhaps more generic approach is needed.

Yeah, I need to sit down and look at the code more closely...  Perhaps a
cpu_mark_all_dirty() is enough.

Paolo