Messages in this thread | | | Date | Wed, 21 Jun 2006 22:24:14 -0400 | From | Dave Jones <> | Subject | Re: [RFC] patch [1/1] convert i386 summit subarch to use SRAT data for apicid_to_node |
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On Wed, Jun 21, 2006 at 06:54:55PM -0700, keith mannthey wrote: > Hello All, > This patch converts the i386 summit subarch apicid_to_node to use node > information provided by the SRAT. The current way of obtaining the > nodeid > > static inline int apicid_to_node(int logical_apicid) > { > return logical_apicid >> 5; > } > > is just not correct for all summit systems/bios. Assuming the apicid > matches the Linux node number require a leap of faith that the bios lay- > ed out the apicids a set way. Modern summit HW does not layout its bios > in the manner for various reasons and is unable to boot i386 numa. > > The best way to get the correct apicid to node information is from the > SRAT table.
Do all summit's have SRAT tables ? I was under the impression the early ones were around before the invention of SRAT.
Dave
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