diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 0e13b2aeea61..eb1004f207b3 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1306,8 +1306,13 @@ int mem_cgroup_swappiness(struct mem_cgroup *memcg) * rcu_read_unlock() * start move here. */ + +/* for quick checking without looking up memcg */ +atomic_t memcg_moving __read_mostly; + static void mem_cgroup_start_move(struct mem_cgroup *memcg) { + atomic_inc(&memcg_moving); atomic_inc(&memcg->moving_account); synchronize_rcu(); } @@ -1318,8 +1323,10 @@ static void mem_cgroup_end_move(struct mem_cgroup *memcg) * Now, mem_cgroup_clear_mc() may call this function with NULL. * We check NULL in callee rather than caller. */ - if (memcg) + if (memcg) { + atomic_dec(&memcg_moving); atomic_dec(&memcg->moving_account); + } } /* |