The patch titled
Subject: mm: vmscan: use kvfree_rcu instead of call_rcu
has been added to the -mm tree. Its filename is
mm-vmscan-use-kvfree_rcu-instead-of-call_rcu.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-use-kvfree_rcu-instead-of-call_rcu.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-use-kvfree_rcu-instead-of-call_rcu.patch
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------------------------------------------------------
From: Yang Shi <shy828301@xxxxxxxxx>
Subject: mm: vmscan: use kvfree_rcu instead of call_rcu
Using kvfree_rcu() to free the old shrinker_maps instead of call_rcu().
We don't have to define a dedicated callback for call_rcu() anymore.
Link: https://lkml.kernel.org/r/20210311190845.9708-6-shy828301@xxxxxxxxx
Signed-off-by: Yang Shi <shy828301@xxxxxxxxx>
Acked-by: Roman Gushchin <guro@xxxxxx>
Acked-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/mm/vmscan.c~mm-vmscan-use-kvfree_rcu-instead-of-call_rcu
+++ a/mm/vmscan.c
@@ -192,11 +192,6 @@ static inline int shrinker_map_size(int
return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long));
}
-static void free_shrinker_map_rcu(struct rcu_head *head)
-{
- kvfree(container_of(head, struct memcg_shrinker_map, rcu));
-}
-
static int expand_one_shrinker_map(struct mem_cgroup *memcg,
int size, int old_size)
{
@@ -220,7 +215,7 @@ static int expand_one_shrinker_map(struc
memset((void *)new->map + old_size, 0, size - old_size);
rcu_assign_pointer(pn->shrinker_map, new);
- call_rcu(&old->rcu, free_shrinker_map_rcu);
+ kvfree_rcu(old, rcu);
}
return 0;
_
Patches currently in -mm which might be from shy828301@xxxxxxxxx are
mm-vmscan-use-nid-from-shrink_control-for-tracepoint.patch
mm-vmscan-consolidate-shrinker_maps-handling-code.patch
mm-vmscan-use-shrinker_rwsem-to-protect-shrinker_maps-allocation.patch
mm-vmscan-remove-memcg_shrinker_map_size.patch
mm-vmscan-use-kvfree_rcu-instead-of-call_rcu.patch
mm-memcontrol-rename-shrinker_map-to-shrinker_info.patch
mm-vmscan-add-shrinker_info_protected-helper.patch
mm-vmscan-use-a-new-flag-to-indicate-shrinker-is-registered.patch
mm-vmscan-add-per-memcg-shrinker-nr_deferred.patch
mm-vmscan-use-per-memcg-nr_deferred-of-shrinker.patch
mm-vmscan-dont-need-allocate-shrinker-nr_deferred-for-memcg-aware-shrinkers.patch
mm-memcontrol-reparent-nr_deferred-when-memcg-offline.patch
mm-vmscan-shrink-deferred-objects-proportional-to-priority.patch
