Re: [Qemu-devel] [RFC 1/1] Execute arbitrary QMP commands from command line

[Paolo Bonzini]

On 30/01/2015 11:02, Dr. David Alan Gilbert wrote:
> Yes; I've not got a clue what it's effect is, but given it's glued into
> the block code I'm sure that breaking it will be subtle and nasty.  I'm
> also reasonably sure it's probably going to do something different in the 
> loadvm
> case which is probably unintended.

It avoids metadata writes that would be concurrent with the source's.

loadvm is okay because it doesn't have a concurrently running source,
but it doesn't hurt either.

Paolo