Re: [Qemu-devel] [RFC] create a single workqueue for each vm to update vm irq routing table

[Avi Kivity]

On 11/26/2013 05:28 PM, Paolo Bonzini wrote:
> Il 26/11/2013 16:25, Avi Kivity ha scritto:
> > > If we want to ensure, we need to use a different mechanism for
> > > synchronization than the global RCU.  QRCU would work; readers are not
> > > wait-free but only if there is a concurrent synchronize_qrcu, which
> > > should be rare.
> > An alternative path is to convince ourselves that the hardware does not
> > provide the guarantees that the current code provides, and so we can
> > relax them.
> No, I think it's a reasonable guarantee to provide.

Why?