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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2012-12-12 22:52:00 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-13 02:38:34 +0100 |
| commit | 20b2f52b73febce476fc9376f0296c1aa0e4f5a7 (patch) | |
| tree | 037d74ec3666d3dfc7c235c7b59b11ed9b29d3b4 /drivers/base | |
| parent | mm, memcg: avoid unnecessary function call when memcg is disabled (diff) | |
| download | linux-20b2f52b73febce476fc9376f0296c1aa0e4f5a7.tar.xz linux-20b2f52b73febce476fc9376f0296c1aa0e4f5a7.zip | |
numa: add CONFIG_MOVABLE_NODE for movable-dedicated node
We need a node which only contains movable memory. This feature is very
important for node hotplug. If a node has normal/highmem, the memory may
be used by the kernel and can't be offlined. If the node only contains
movable memory, we can offline the memory and the node.
All are prepared, we can actually introduce N_MEMORY.
add CONFIG_MOVABLE_NODE make we can use it for movable-dedicated node
[akpm@linux-foundation.org: fix Kconfig text]
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/node.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c index 49dbe7dc9ada..fac124a7e1c5 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -644,6 +644,9 @@ static struct node_attr node_state_attr[] = { #ifdef CONFIG_HIGHMEM [N_HIGH_MEMORY] = _NODE_ATTR(has_high_memory, N_HIGH_MEMORY), #endif +#ifdef CONFIG_MOVABLE_NODE + [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), +#endif [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), }; @@ -654,6 +657,9 @@ static struct attribute *node_state_attrs[] = { #ifdef CONFIG_HIGHMEM &node_state_attr[N_HIGH_MEMORY].attr.attr, #endif +#ifdef CONFIG_MOVABLE_NODE + &node_state_attr[N_MEMORY].attr.attr, +#endif &node_state_attr[N_CPU].attr.attr, NULL }; |