RE: [PATCH 1/3] A device for zero-copy based on KVM virtio-net.

[Xin, Xiaohui]

Michael,
 
>> Qemu needs a userspace write, is that a synchronous one or
>>asynchronous one?

>It's a synchronous non-blocking write.
Sorry, why the Qemu live migration needs the device have a userspace write?
how does the write operation work? And why a read operation is not cared here?

Thanks
Xiaohui
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