Re: Rework of the userspace interrupt handling patch

[Samuel Thibault]

Justus Winter, on Sun 28 Feb 2016 23:51:40 +0100, wrote:
> Quoting Samuel Thibault (2016-02-28 22:35:14)
> > Justus Winter, on Sun 28 Feb 2016 00:33:20 +0100, wrote:
> > > 3/ ... instead the notification message carries a send right as the
> > > reply port, and the userspace server acknowledges the interrupt by
> > > deallocating this right.
> > 
> > That makes much more sense to me than the current disable/enable.  I
> > guess that this will allow on the long run to have shared interrupts?
> 
> I believe so, but I don't know how interrupt sharing works.  I guess
> all the drivers have to acknowledge the irq before it can be
> reenabled?

Yes.

> If so, then this interface will make it possible to implement this.

That's what I felt, yes.

> It is also safer in the sense that only the interrupt can be reenabled
> that was disabled because of the notification.

Yes.

Samuel