[PATCH] cpu to node relationship fixup: acpi_map_cpu2node
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Mon, 25 Sep 2006 23:25:21 +0000 (16:25 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Tue, 26 Sep 2006 00:38:36 +0000 (17:38 -0700)
commit08992986497471ce575f23796268fb1b50b5c2ab
tree186f08591c58f21a4c8c2d30070c35392be3439a
parent25981de5b836581364612a4b1fe27db3b5d1f861
[PATCH] cpu to node relationship fixup: acpi_map_cpu2node

Problem description:

  We have additional_cpus= option for allocating possible_cpus.  But nid
  for possible cpus are not fixed at boot time.  cpus which is offlined at
  boot or cpus which is not on SRAT is not tied to its node.  This will
  cause panic at cpu onlining.

Usually, pxm_to_nid() mapping is fixed at boot time by SRAT.

But, unfortunately, some system (my system!) do not include
full SRAT table for possible cpus.  (Then, I use
additiona_cpus= option.)

For such possible cpus, pxm<->nid should be fixed at
hot-add.  We now have acpi_map_pxm_to_node() which is also
used at boot.  It's suitable here.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/ia64/kernel/acpi.c