cpuset: update top cpuset's mems after adding a node
commitf481891fdc49d3d1b8a9674a1825d183069a805f
authorMiao Xie <miaox@cn.fujitsu.com>
Wed, 19 Nov 2008 23:36:30 +0000 (19 15:36 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 20 Nov 2008 02:49:58 +0000 (19 18:49 -0800)
tree4f027a1321dcd06165394d0a23e49df51c8befc1
parentac97b9f9a2d0b83488e0bbcb8517b229d5c9b142
cpuset: update top cpuset's mems after adding a node

After adding a node into the machine, top cpuset's mems isn't updated.

By reviewing the code, we found that the update function

  cpuset_track_online_nodes()

was invoked after node_states[N_ONLINE] changes.  It is wrong because
N_ONLINE just means node has pgdat, and if node has/added memory, we use
N_HIGH_MEMORY.  So, We should invoke the update function after
node_states[N_HIGH_MEMORY] changes, just like its commit says.

This patch fixes it.  And we use notifier of memory hotplug instead of
direct calling of cpuset_track_online_nodes().

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Paul Menage <menage@google.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/cpuset.h
kernel/cpuset.c
mm/memory_hotplug.c