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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2012-07-31 16:42:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-31 18:42:41 -0700
commit8e6ac7fab374816de9a8b0a8fbb02ef761a30ff4 (patch)
tree94439bfcceb9e11af842da63f18f608aff4919c4 /mm/migrate.c
parentabb8206cb07734d0b7bf033c715995d6371a94c3 (diff)
hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration
With HugeTLB pages, hugetlb cgroup is uncharged in compound page destructor. Since we are holding a hugepage reference, we can be sure that old page won't get uncharged till the last put_page(). Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index fdce3a29fc4c..6c37c51565e5 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -33,6 +33,7 @@
#include <linux/memcontrol.h>
#include <linux/syscalls.h>
#include <linux/hugetlb.h>
+#include <linux/hugetlb_cgroup.h>
#include <linux/gfp.h>
#include <asm/tlbflush.h>
@@ -931,6 +932,10 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
if (anon_vma)
put_anon_vma(anon_vma);
+
+ if (!rc)
+ hugetlb_cgroup_migrate(hpage, new_hpage);
+
unlock_page(hpage);
out:
put_page(new_hpage);