Re: [Qemu-devel] [PATCH 09/17] aio: prepare for introducing GSource-based dispatch

[Paolo Bonzini]

Il 26/09/2012 00:01, Anthony Liguori ha scritto:
> > +        revents = node->pfd.revents & node->pfd.events;
> > +        node->pfd.revents &= ~revents;
> 
> This is interesting and I must admit I don't understand why it's
> necessary.  What case are you trying to handle?

That's for the case where you got a write event for fd Y, but disabled
the write handler from the handler of fd X (called before fd Y).  But
what the current code does is just eat the event, so I can do the same
and set node->pfd.revents to 0.

Paolo