Re: [v3.4-rc1] ACPI regression bisected

From: Thomas Gleixner
Date: Thu Apr 12 2012 - 13:10:02 EST


On Thu, 12 Apr 2012, Thomas Gleixner wrote:

> On Thu, 12 Apr 2012, Matthew Garrett wrote:
>
> > On Thu, Apr 12, 2012 at 10:57:45AM +0200, Thomas Gleixner wrote:
> >
> > > OK, so now the question is whether the ACPI interrupt can end up being
> > > shared or not.
> >
> > Per spec:
> >
> > "OSPM is required to treat the ACPI SCI interrupt as a sharable, level,
> > active low interrupt."
>
> I feared that. So now is the question whether there is a way to mask
> the interrupt at the "device" level.

If not, I could be persuaded to provide a mechanism to force thread
all interrupts which are on that line, if there's a good argument to
do so.

All machines in my farm do not share the line, so I guess it's only
relevant when you boot with apic disabled or such.

Thanks,

tglx
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