+ mm-memcg-fix-memcg-file_dirty-numa-stat.patch added to -mm tree

The patch titled
     Subject: mm: memcg: fix memcg file_dirty numa stat
has been added to the -mm tree.  Its filename is
     mm-memcg-fix-memcg-file_dirty-numa-stat.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-memcg-fix-memcg-file_dirty-numa-stat.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-memcg-fix-memcg-file_dirty-numa-stat.patch

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------------------------------------------------------
From: Shakeel Butt <redacted>
Subject: mm: memcg: fix memcg file_dirty numa stat

The kernel updates the per-node NR_FILE_DIRTY stats on page migration but
not the memcg numa stats.  That was not an issue until recently the commit
5f9a4f4a7096 ("mm: memcontrol: add the missing numa_stat interface for
cgroup v2") exposed numa stats for the memcg.  So fix the file_dirty
per-memcg numa stat.

Link: https://lkml.kernel.org/r/20210108155813.2914586-1-shakeelb@google.com
Fixes: 5f9a4f4a7096 ("mm: memcontrol: add the missing numa_stat interface for cgroup v2")
Signed-off-by: Shakeel Butt <redacted>
Reviewed-by: Muchun Song <redacted>
Acked-by: Yang Shi <redacted>
Reviewed-by: Roman Gushchin <redacted>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/migrate.c~mm-memcg-fix-memcg-file_dirty-numa-stat
+++ a/mm/migrate.c

@@ -500,9 +500,9 @@ int migrate_page_move_mapping(struct add
 			__inc_lruvec_state(new_lruvec, NR_SHMEM);
 		}
 		if (dirty && mapping_can_writeback(mapping)) {
-			__dec_node_state(oldzone->zone_pgdat, NR_FILE_DIRTY);
+			__dec_lruvec_state(old_lruvec, NR_FILE_DIRTY);
 			__dec_zone_state(oldzone, NR_ZONE_WRITE_PENDING);
-			__inc_node_state(newzone->zone_pgdat, NR_FILE_DIRTY);
+			__inc_lruvec_state(new_lruvec, NR_FILE_DIRTY);
 			__inc_zone_state(newzone, NR_ZONE_WRITE_PENDING);
 		}
 	}

_

Patches currently in -mm which might be from shakeelb@google.com are

mm-memcg-fix-memcg-file_dirty-numa-stat.patch
mm-fix-numa-stats-for-thp-migration.patch
mm-memcg-add-swapcache-stat-for-memcg-v2.patch