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authorAndi Kleen <ak@linux.intel.com>2011-03-22 16:33:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:05 -0700
commit78afd5612deb8268bafc8b6507d72341d5ed9aac (patch)
treeb96131d6f237b9ce6848d95c8eccdd1f7855365c /include/linux/vmstat.h
parent11bc82d67d1150767901bca54a24466621d763d7 (diff)
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mm: add __GFP_OTHER_NODE flag
Add a new __GFP_OTHER_NODE flag to tell the low level numa statistics in zone_statistics() that an allocation is on behalf of another thread. This way the local and remote counters can be still correct, even when background daemons like khugepaged are changing memory mappings. This only affects the accounting, but I think it's worth doing that right to avoid confusing users. I first tried to just pass down the right node, but this required a lot of changes to pass down this parameter and at least one addition of a 10th argument to a 9 argument function. Using the flag is a lot less intrusive. Open: should be also used for migration? [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/vmstat.h')
-rw-r--r--include/linux/vmstat.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 833e676d6d92..461c0119664f 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -220,12 +220,12 @@ static inline unsigned long node_page_state(int node,
zone_page_state(&zones[ZONE_MOVABLE], item);
}
-extern void zone_statistics(struct zone *, struct zone *);
+extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
#else
#define node_page_state(node, item) global_page_state(item)
-#define zone_statistics(_zl,_z) do { } while (0)
+#define zone_statistics(_zl, _z, gfp) do { } while (0)
#endif /* CONFIG_NUMA */