The patch titled
memcg: fix off-by-one when calculating swap cgroup map length
has been added to the -mm tree. Its filename is
memcg-fix-off-by-one-when-calculating-swap-cgroup-map-length.patch
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------------------------------------------------------
Subject: memcg: fix off-by-one when calculating swap cgroup map length
From: Namhyung Kim <namhyung@xxxxxxxxx>
It allocated one more page than necessary if @max_pages was a multiple of
SC_PER_PAGE.
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Acked-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Cc: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_cgroup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page_cgroup.c~memcg-fix-off-by-one-when-calculating-swap-cgroup-map-length mm/page_cgroup.c
--- a/mm/page_cgroup.c~memcg-fix-off-by-one-when-calculating-swap-cgroup-map-length
+++ a/mm/page_cgroup.c
@@ -475,7 +475,7 @@ int swap_cgroup_swapon(int type, unsigne
if (!do_swap_account)
return 0;
- length = ((max_pages/SC_PER_PAGE) + 1);
+ length = DIV_ROUND_UP(max_pages, SC_PER_PAGE);
array_size = length * sizeof(void *);
array = vmalloc(array_size);
_
Patches currently in -mm which might be from namhyung@xxxxxxxxx are
mm-nommu-sort-mm-mmap-list-properly.patch
mm-nommu-sort-mm-mmap-list-properly-fix.patch
mm-nommu-dont-scan-the-vma-list-when-deleting.patch
mm-nommu-find-vma-using-the-sorted-vma-list.patch
mm-nommu-check-the-vma-list-when-unmapping-file-mapped-vma.patch
mm-nommu-fix-a-potential-memory-leak-in-do_mmap_private.patch
mm-nommu-fix-a-compile-warning-in-do_mmap_pgoff.patch
memcg-mark-init_section_page_cgroup-properly.patch
memcg-fix-off-by-one-when-calculating-swap-cgroup-map-length.patch
memcg-move-page-freeing-code-out-of-lock.patch
maintainers-add-mm-page_cgroupc-into-memcg-subsystem.patch
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