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Date: Mon, 10 Apr 2006 10:39:29 -0500
From: Jake Moilanen <moilanen@austin.ibm.com>
To: paulus@samba.org
Subject: Re: [PATCH 2/2] Base pSeries PCIe support
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On Sat, 1 Apr 2006 16:57:23 -0600
Jake Moilanen <moilanen@austin.ibm.com> wrote:

> On Sat, 1 Apr 2006 19:36:07 +1100
> Paul Mackerras <paulus@samba.org> wrote:
> 
> > Jake Moilanen writes:
> > 
> > > The NR_IRQS got bumped up to 1024, as vectors can go much higher.
> > > Unfortunately, this number was arbitrarily picked as there is no claim
> > > at what the max number really is by either the firmware team, or the
> > > PAPR+.
> > 
> > What matters is the number of different vectors, not the actual value
> > of the vectors, because we remap interrupt numbers that the firmware
> > gives us to logical Linux irq numbers between 0 and NR_IRQS-1.  We had
> > to do that when the POWER5 systems came out, because the interrupt
> > numbers there occupy 24 bits.
> 
> Ah.  That sounds right.  I haven't had a chance to test this version of
> the patch.  Firmware is currently broken on my machine.

I was able to validate that these patches do work, and we are receiving
MSI interrupts correctly.

Is it too late to get into 2.6.17?

Jake