Re: Multiple MSI

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2008-07-03 at 05:31 -0600, Matthew Wilcox wrote:
> On Thu, Jul 03, 2008 at 07:17:00PM +1000, Benjamin Herrenschmidt wrote:
> > > Some years ago, we had discussions about getting rid of IRQ numbers
> > > altogether, or at least the requirement to have device drivers know
> > > about them. Does anyone remember what happened to that idea?
> > 
> > I think it's not totally dead. Last I heard, someone (jgarzik ?) was
> > slowly, bit by bit, removing the dependencies on the irq argument on irq
> > handlers which is one step in the direction.
> 
> I think that project's dead, Jim.  http://lkml.org/lkml/2008/4/22/578

Ouch, missed that one... sad, would have been a good idea in the long
run. irq_desc array is a big PITA.

> You can't do that.  /proc/interrupts is so terribly useful for a
> sysadmin that you can't remove information from it.

You can create a new one with informations about the new stuff..

Anyway, looks like it's not happening and we'll be stuck with the bloody
array for the time being. Crap.

Ben.