[Qemu-devel] Re: Live migration broken when under heavy IO

[Charles Duffy]

I'm not sure if this is related, but to comment --

I'm seeing what appears to be occasional dropped I/O on non-live 
migration -- that is to say, stop, migrate-to-disk, shuffle files 
around, migrate-from-disk, cont. I have not yet been able to reproduce 
this with cache=off.

As I understand it, the bulk of discussion in this thread is about I/O 
submitted by the guest after the migration starts; as I'm stopping the 
guest CPU _before_ initiating migration, there would appear to be 
outstanding issues not limited to this scenario.

[qemu-kvm-0.10.5, IDE, qcow2]