tree 355479f5a20d1ed71261bd9071583651e5983f4e
parent d7e0b37a87c39f5c02dd7b5d55c7a3ec2f65b943
author Toshi Kani <toshi.kani@hp.com> 1384297693 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1384312149 +0900

mm: clear N_CPU from node_states at CPU offline

vmstat_cpuup_callback() is a CPU notifier callback, which marks N_CPU to a
node at CPU online event.  However, it does not update this N_CPU info at
CPU offline event.

Changed vmstat_cpuup_callback() to clear N_CPU when the last CPU in the
node is put into offline, i.e.  the node no longer has any online CPU.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Acked-by: Christoph Lameter <cl@linux.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Tested-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>