From: "Joachim Deguara" <joachim.deguara@amd.com>
To: "lkml List" <linux-kernel@vger.kernel.org>
Cc: gregkh@suse.de, "Andreas Kleen" <ak@suse.de>,
lenb@kernel.org, "Christoph Lameter" <clameter@sgi.com>
Subject: [PATCH 0/2] faking and fixing the NUMA SLIT
Date: Wed, 18 Jul 2007 11:30:01 +0200 [thread overview]
Message-ID: <200707181130.01861.joachim.deguara@amd.com> (raw)
The problem with NUMA distances in the SLIT is that they are often wrong, oh
wait they aren't there at all because the BIOS didn't create a SLIT since
Windows does not use it. If Linux does not find a slit it just says the
distance to local=10 and remote=20 according to ACPI spec. The problem is
when we have a 4P system (or larger), there is generally one node where we
have two hops and its distance should be >20.
Following are patches to first fake the SLIT in the ACPI code and then add
ability to write the distances from sysfs.
-Joachim
next reply other threads:[~2007-07-18 9:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-18 9:30 Joachim Deguara [this message]
2007-07-18 9:30 ` [PATCH 1/2] fake " Joachim Deguara
2007-07-18 9:31 ` [PATCH 2/2] make node distance writeable Joachim Deguara
2007-07-18 9:42 ` [PATCH 0/2] faking and fixing the NUMA SLIT Andi Kleen
2007-07-18 9:57 ` Joachim Deguara
2007-07-23 20:25 ` Christoph Lameter
2007-07-23 22:10 ` Len Brown
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