Re: [Qemu-stable] [PATCH v2 5/5] block: keep AioContext pointer in BlockBackend

[Paolo Bonzini]

On 29/09/2016 05:05, Fam Zheng wrote:
> > So whether we can move a certain BB from some context to another depends
> > on what the frontend supports, I don't think there is a generic answer
> > we can implement here in the generic BB code. NBD for instance allows
> > any movement; but devices probably only allow movements they have
> > initiated themselves (e.g. dataplane will allow exactly what you
> > describe here with that assertion, and any other device will probably
> > not allow anything but the main loop).
> 
> Indeed, you make me think this should be an op blocker (that applies on whole
> graph).

The concept of a BDS or BB's AioContext is going to disappear sooner or
later, take this into account to decide how much effort to put into
fixing this.

Paolo