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cpuset: update top cpuset's mems after adding a node

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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>
This commit is contained in:
Miao Xie 2008-11-19 15:36:30 -08:00 • committed by Linus Torvalds
parent ac97b9f9a2
commit f481891fdc
3 changed files with 16 additions and 10 deletions
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4
include/linux/cpuset.h
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@ -74,8 +74,6 @@ static inline int cpuset_do_slab_mem_spread(void)
return current->flags & PF_SPREAD_SLAB;
}
extern void cpuset_track_online_nodes(void);
extern int current_cpuset_is_being_rebound(void);
extern void rebuild_sched_domains(void);
@ -151,8 +149,6 @@ static inline int cpuset_do_slab_mem_spread(void)
return 0;
}
static inline void cpuset_track_online_nodes(void) {}
static inline int current_cpuset_is_being_rebound(void)
{
return 0;