Re: [RFC PATCH 00/13] Add support for Mirror VM.

[Paolo Bonzini]

On 16/08/21 17:16, Daniel P. Berrangé wrote:
> I woudn't be needed to create migration threads at startup - we should
> just think about how we would identify and control them when created
> at runtime. The complexity here is a trust issue - once guest code has
> been run, we can't trust what QMP tells us - so I'm not sure how we
> would learn what PIDs are associated with the transiently created
> migration threads, in order to set their properties.

That would apply anyway to any kind of thread though.  It doesn't matter 
whether the migration thread runs host or (mostly) guest code.

Paolo