Re: [Qemu-devel] [PATCH COLO-Frame (Base) v21 08/17] COLO: Send PVM state to secondary side when do checkpoint

[Amit Shah]

On (Tue) 18 Oct 2016 [20:10:04], zhanghailiang wrote:
> VM checkpointing is to synchronize the state of PVM to SVM, just
> like migration does, we re-use save helpers to achieve migrating
> PVM's state to Secondary side.
> 
> COLO need to cache the data of VM's state in the secondary side before
> synchronize it to SVM. COLO need the size of the data to determine
> how much data should be read in the secondary side.
> So here, we can get the size of the data by saving it into I/O channel
> before send it to the secondary side.

BTW PVM and SVM and Primary and Secondary are used interchangeably and
inconsistently.  I'd prefer if you stuck with one usage.  I prefer
Primary and Secondary, but it doesn't matter what you choose.

                Amit