[PATCH] memcg: fix slab accounting in refill_obj_stock() trylock path

[Hao Li]

In the trylock path of refill_obj_stock(), mod_objcg_mlstate() should
use the real alloc/free bytes (i.e., nr_acct) for accounting, rather
than nr_bytes.

Fixes: 200577f69f29 ("memcg: objcg stock trylock without irq disabling")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Hao Li <hao.li@xxxxxxxxx>
---
 mm/memcontrol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2d6dfba540d4..683f9f9bf47e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3060,7 +3060,7 @@ static void refill_obj_stock(struct obj_cgroup *objcg, unsigned int nr_bytes,
 
 	if (!local_trylock(&obj_stock.lock)) {
 		if (pgdat)
-			mod_objcg_mlstate(objcg, pgdat, idx, nr_bytes);
+			mod_objcg_mlstate(objcg, pgdat, idx, nr_acct);
 		nr_pages = nr_bytes >> PAGE_SHIFT;
 		nr_bytes = nr_bytes & (PAGE_SIZE - 1);
 		atomic_add(nr_bytes, &objcg->nr_charged_bytes);
-- 
2.50.1