When user use memory.reclaim to reclaim memory, after drain percpu lru
caches, drain percpu charge caches for given memcg stock in the hope
of introducing more evictable pages.
Signed-off-by: Lu Jialin <lujialin4@xxxxxxxxxx>
---
mm/memcontrol.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2d8549ae1b30..768091cc6a9a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6593,10 +6593,13 @@ static ssize_t memory_reclaim(struct kernfs_open_file *of, char *buf,
/*
* This is the final attempt, drain percpu lru caches in the
* hope of introducing more evictable pages for
- * try_to_free_mem_cgroup_pages().
+ * try_to_free_mem_cgroup_pages(). Also, drain all percpu
+ * charge caches for given memcg.
*/
- if (!nr_retries)
+ if (!nr_retries) {
lru_add_drain_all();
+ drain_all_stock(memcg);
+ }
reclaimed = try_to_free_mem_cgroup_pages(memcg,
nr_to_reclaim - nr_reclaimed,
--
2.17.1
