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

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Message-ID: <20060930093421.GP22787@rhun.haifa.ibm.com>
Date:	Sat, 30 Sep 2006 12:34:21 +0300
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Andrew Morton <akpm@...l.org>, Greg KH <greg@...ah.com>,
	Jim Paradis <jparadis@...hat.com>, Andi Kleen <ak@...e.de>,
	LKML <linux-kernel@...r.kernel.org>, jdmason@...zu.us
Subject: Re: [PATCH] x86[-64] PCI domain support

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.

Cheers,
Muli
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