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Subject[PATCH][for -mm] per-zone and reclaim enhancements for memory controller take 3 [2/10] nid/zid helper function for cgroup
Add macro to get node_id and zone_id of page_cgroup.
Will be used in per-zone-xxx patches and others.

Changelog:
- returns zone_type instead of int.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>


mm/memcontrol.c | 10 ++++++++++
1 file changed, 10 insertions(+)

Index: linux-2.6.24-rc3-mm1/mm/memcontrol.c
===================================================================
--- linux-2.6.24-rc3-mm1.orig/mm/memcontrol.c 2007-11-26 15:31:19.000000000 +0900
+++ linux-2.6.24-rc3-mm1/mm/memcontrol.c 2007-11-26 16:39:00.000000000 +0900
@@ -135,6 +135,16 @@
#define PAGE_CGROUP_FLAG_CACHE (0x1) /* charged as cache */
#define PAGE_CGROUP_FLAG_ACTIVE (0x2) /* page is active in this cgroup */

+static inline int page_cgroup_nid(struct page_cgroup *pc)
+{
+ return page_to_nid(pc->page);
+}
+
+static inline enum zone_type page_cgroup_zid(struct page_cgroup *pc)
+{
+ return page_zonenum(pc->page);
+}
+
enum {
MEM_CGROUP_TYPE_UNSPEC = 0,
MEM_CGROUP_TYPE_MAPPED,
-
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