On 2015/2/10 20:04, Michael S. Tsirkin wrote: > So that's not good. We need a way to negotiate the capability, > we can't just deadlock with legacy slaves.
Or add a new message to query slaves' version if slaves not reply we don't wait otherwise if the version as same as QEMU we wait the reply. Mostly the same as iotcl may be all messages need reply. -- Regards, Haifeng
