From: Jesse Barnes <jbarnes@engr.sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: interrupt locality for NUMA
Date: Fri, 13 Aug 2004 15:32:03 +0000 [thread overview]
Message-ID: <200408130832.03760.jbarnes@engr.sgi.com> (raw)
In-Reply-To: <1092365888.6434.25.camel@localhost.localdomain>
On Thursday, August 12, 2004 7:58 pm, Alex Williamson wrote:
> This probably isn't ready for inclusion yet, but I wanted to see if
> anybody else could make use of it. This works on HP sx1000 boxes setup
> for NUMA and I think it's ACPI namespace does the right thing. All this
> does is walk through namespace looking for devices with an _MAT method
> that returns an IOSAPIC and also has a _PXM method to tell us the
> proximity domain where it lives. The node data gets stored in the
> iosapic data structure because doing this lookup is pretty slow. Does
> this jive with what other ACPI NUMA boxes are exporting in namespace?
> I'm hoping everyone will put the _PXM on the same device as the _MAT,
> but I'm wondering if I need to add support for looking on parent
> objects. Thoughts? Thanks,
Matt Dobson is working on a pci_to_nodemask, might that be used instead? If
we did it that way, we could put it in generic code, dependent on CONFIG_NUMA
or something, rather than keeping it ACPI specific.
Jesse
next prev parent reply other threads:[~2004-08-13 15:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-13 2:58 interrupt locality for NUMA Alex Williamson
2004-08-13 15:32 ` Jesse Barnes [this message]
2004-08-13 15:41 ` Alex Williamson
2004-08-13 15:50 ` Jesse Barnes
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