Re: [PATCH] x86[-64] PCI domain support

From: Muli Ben-Yehuda
Date: Sat Sep 30 2006 - 05:39:54 EST

On Fri, Sep 29, 2006 at 02:31:16AM +0300, Muli Ben-Yehuda wrote:
> On Thu, Sep 28, 2006 at 07:03:28PM -0400, Jeff Garzik wrote:
> > hmmmm. What kernels did you test?
> mainline as of today + several unrelated Calgary patches I'll post
> shortly + your PCI domains patch + my Calgary patch. I'll test with
> iommu=off next.
> > That should narrow down the problems. A problem with aic94xx sorta
> > sounds like something unrelated.
> Not necessarily - Calgary is an isolating IOMMU, meaning that if we
> set up a mapping for aic94xx in the wrong IO space due to a Calgary
> bug, aic94xx will fall over and die. Usually however this happens a
> lot sooner. Also, we have code in Calgary to detect when an errant DMA
> happens and it hasn't triggered in this case.

Ok, turns out it's neither a PCI domains nor Calgary issue, since I
can reproduce it on mainline with iommu=off. Must be an aic94xx
issue, I'll send the details to linux-scsi in a bit.

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