Convert the i386 summit subarch apicid_to_node to use node information
provided by the SRAT. It was discussed a little on LKML a few weeks ago
and was seen as an acceptable fix. 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 mapped
out the apicids a set way. Modern summit HW (IBM x460) 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 during boot. It lays out what apicid belongs to what node. I use
this information to create a table for use at run time.
Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
We cannot check MAX_NR_ZONES since it not defined in the preprocessor
anymore.
So remove the check.
The maximum number of zones per node for i386 is 3 since i386 does not
support ZONE_DMA32.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Consolidate the various arch-specific implementations of pxm_to_node() and
node_to_pxm() into a single generic version.
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The code should deal with an additional empty zone, so fix up the
#error.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch adds a check for the return value of acpi_find_root_pointer().
Without this patch systems without ACPI support such as QEMU crashes when
booting a NUMA kernel with CONFIG_ACPI_SRAT=y.
Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
keith mannthey
Mel Gorman
Christoph Lameter
Jörn Engel
Yasunori Goto
Andi Kleen
Magnus Damm
Linus Torvalds