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

[Jeff Garzik <jeff@garzik.org>]

Muli Ben-Yehuda wrote:
> On Thu, Sep 28, 2006 at 05:45:41AM -0400, Jeff Garzik wrote:
> > Muli Ben-Yehuda wrote:
> > > On Tue, Sep 26, 2006 at 03:15:08PM -0400, Jeff Garzik wrote:
> > > > The x86[-64] PCI domain effort needs to be restarted, because we've got
> > > > machines out in the field that need this in order for some devices to
> > > > work.
> > > This breaks the Calgary IOMMU, since it uses sysdata for other
> > > purposes (going back from a bus to its IO address space). I'm looking
> > > into it.
> > You'll need to modify struct pci_sysdata in 
> > include/asm-{i386,x86_64}/pci.h to include the data that you previously 
> > stored directly into the sysdata pointer.
>
> Something like this should do the trick. Note - this should not be
> applied yet - after several gigabytes of network and disk activity it
> takes aic94xx down. More investigation required.

hmmmm.  What kernels did you test?

I would suggest testing

jgarzik/misc-2.6.git#master	-> vanilla Linux kernel
jgarzik/misc-2.6.git#pciseg	-> #master + PCI domain support
#pciseg + your patch

That should narrow down the problems.  A problem with aic94xx sorta 
sounds like something unrelated.


> diff -Naurp -X /home/muli/w/dontdiff pci-domains/arch/x86_64/kernel/pci-calgary.c linux/arch/x86_64/kernel/pci-calgary.c
> --- pci-domains/arch/x86_64/kernel/pci-calgary.c	2006-09-28 13:31:14.000000000 +0300
> +++ linux/arch/x86_64/kernel/pci-calgary.c	2006-09-28 13:14:38.000000000 +0300

ACK patch


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