The patch titled
Subject: mm: migration of hugetlbfs page skip memcg
has been added to the -mm tree. Its filename is
mm-migration-of-hugetlbfs-page-skip-memcg.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-migration-of-hugetlbfs-page-skip-memcg.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-migration-of-hugetlbfs-page-skip-memcg.patch
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------------------------------------------------------
From: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: mm: migration of hugetlbfs page skip memcg
hugetlbfs pages do not participate in memcg: so although they do find most
of migrate_page_states() useful, it would be better if they did not call
into mem_cgroup_migrate() - where Qian Cai reported that LTP's
move_pages12 triggers the warning in Alex Shi's prospective commit
"mm/memcg: warning on !memcg after readahead page charged".
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301359460.5954@eggly.anvils
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Qian Cai <cai@xxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/migrate.c~mm-migration-of-hugetlbfs-page-skip-memcg
+++ a/mm/migrate.c
@@ -668,7 +668,8 @@ void migrate_page_states(struct page *ne
copy_page_owner(page, newpage);
- mem_cgroup_migrate(page, newpage);
+ if (!PageHuge(page))
+ mem_cgroup_migrate(page, newpage);
}
EXPORT_SYMBOL(migrate_page_states);
_
Patches currently in -mm which might be from hughd@xxxxxxxxxx are
ksm-reinstate-memcg-charge-on-copied-pages.patch
mm-migration-of-hugetlbfs-page-skip-memcg.patch
shmem-shmem_writepage-split-unlikely-i915-thp.patch
mm-fix-check_move_unevictable_pages-on-thp.patch
mlock-fix-unevictable_pgs-event-counts-on-thp.patch
