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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-09-25 16:25:31 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-25 17:38:36 -0700
commit3212fe1594e577463bc8601d28aa008f520c3377 (patch)
tree6f4270c825c2df9f4a361360dab0963ecaed34c1 /arch/ia64/kernel/topology.c
parent08992986497471ce575f23796268fb1b50b5c2ab (diff)
[PATCH] cpu to node relationship fixup: map cpu to node
Assume that a cpu is *physically* offlined at boot time... Because smpboot.c::smp_boot_cpu_map() canoot find cpu's sapicid, numa.c::build_cpu_to_node_map() cannot build cpu<->node map for offlined cpu. For such cpus, cpu_to_node map should be fixed at cpu-hot-add. This mapping should be done before cpu onlining. This patch also handles cpu hotremove case. 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>
Diffstat (limited to 'arch/ia64/kernel/topology.c')
-rw-r--r--arch/ia64/kernel/topology.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index f648c610b10..05bdf7affb4 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -36,6 +36,9 @@ int arch_register_cpu(int num)
*/
if (!can_cpei_retarget() && is_cpu_cpei_target(num))
sysfs_cpus[num].cpu.no_control = 1;
+#ifdef CONFIG_NUMA
+ map_cpu_to_node(num, node_cpuid[num].nid);
+#endif
#endif
return register_cpu(&sysfs_cpus[num].cpu, num);
@@ -45,7 +48,8 @@ int arch_register_cpu(int num)
void arch_unregister_cpu(int num)
{
- return unregister_cpu(&sysfs_cpus[num].cpu);
+ unregister_cpu(&sysfs_cpus[num].cpu);
+ unmap_cpu_from_node(num, cpu_to_node(num));
}
EXPORT_SYMBOL(arch_register_cpu);
EXPORT_SYMBOL(arch_unregister_cpu);