memcg: trivial cleanups

Clean up some mess made by the "Soft limit rework" series, and a few other
things.

Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 46717d6..c452445 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -279,7 +279,7 @@ struct mem_cgroup {
         * Should we move charges of a task when a task is moved into this
         * mem_cgroup ? And what type of charges should we move ?
         */
-       unsigned long   move_charge_at_immigrate;
+       unsigned long move_charge_at_immigrate;
        /*
         * set > 0 if pages under this cgroup are moving to other cgroup.
         */
@@ -324,7 +324,7 @@ struct mem_cgroup {
 
        /*
         * If true then this group has increased parents' children_in_excess
-         * when it got over the soft limit.
+        * when it got over the soft limit.
         * When a group falls bellow the soft limit, parents' children_in_excess
         * is decreased and soft_contributed changed to false.
         */
@@ -835,12 +835,12 @@ static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg,
 }
 
 /*
- * Called from rate-limitted memcg_check_events when enough
+ * Called from rate-limited memcg_check_events when enough
  * MEM_CGROUP_TARGET_SOFTLIMIT events are accumulated and it makes sure
- * that all the parents up the hierarchy will be noticed that this group
+ * that all the parents up the hierarchy will be notified that this group
  * is in excess or that it is not in excess anymore. mmecg->soft_contributed
  * makes the transition a single action whenever the state flips from one to
- * other.
+ * the other.
  */
 static void mem_cgroup_update_soft_limit(struct mem_cgroup *memcg)
 {
@@ -1881,8 +1881,8 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg)
 /*
  * A group is eligible for the soft limit reclaim under the given root
  * hierarchy if
- *     a) it is over its soft limit
- *     b) any parent up the hierarchy is over its soft limit
+ *     a) it is over its soft limit
+ *     b) any parent up the hierarchy is over its soft limit
  *
  * If the given group doesn't have any children over the limit then it
  * doesn't make any sense to iterate its subtree.
@@ -1904,7 +1904,7 @@ mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
         * If any parent up to the root in the hierarchy is over its soft limit
         * then we have to obey and reclaim from this group as well.
         */
-       while((parent = parent_mem_cgroup(parent))) {
+       while ((parent = parent_mem_cgroup(parent))) {
                if (res_counter_soft_limit_excess(&parent->res))
                        return VISIT;
                if (parent == root)
@@ -2309,7 +2309,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg, bool sync)
                        flush_work(&stock->work);
        }
 out:
-       put_online_cpus();
+       put_online_cpus();
 }
 
 /*
@@ -2741,7 +2741,7 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *memcg,
         * is accessed after testing USED bit. To make pc->mem_cgroup visible
         * before USED bit, we need memory barrier here.
         * See mem_cgroup_add_lru_list(), etc.
-        */
+        */
        smp_wmb();
        SetPageCgroupUsed(pc);
 
@@ -3483,9 +3483,9 @@ __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **_memcg, int order)
         * the page allocator. Therefore, the following sequence when backed by
         * the SLUB allocator:
         *
-        *      memcg_stop_kmem_account();
-        *      kmalloc(<large_number>)
-        *      memcg_resume_kmem_account();
+        *      memcg_stop_kmem_account();
+        *      kmalloc(<large_number>)
+        *      memcg_resume_kmem_account();
         *
         * would effectively ignore the fact that we should skip accounting,
         * since it will drive us directly to this function without passing
@@ -4514,7 +4514,7 @@ static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
                                   MEM_CGROUP_RECLAIM_SHRINK);
                curusage = res_counter_read_u64(&memcg->res, RES_USAGE);
                /* Usage is reduced ? */
-               if (curusage >= oldusage)
+               if (curusage >= oldusage)
                        retry_count--;
                else
                        oldusage = curusage;
@@ -4535,7 +4535,7 @@ static int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg,
        int enlarge = 0;
 
        /* see mem_cgroup_resize_res_limit */
-       retry_count = children * MEM_CGROUP_RECLAIM_RETRIES;
+       retry_count = children * MEM_CGROUP_RECLAIM_RETRIES;
        oldusage = res_counter_read_u64(&memcg->memsw, RES_USAGE);
        while (retry_count) {
                if (signal_pending(current)) {

diff --git a/mm/vmscan.c b/mm/vmscan.c
index fa91c20..76d1d5e 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2205,12 +2205,12 @@ static void shrink_zone(struct zone *zone, struct scan_control *sc)
 
        scanned_groups = __shrink_zone(zone, sc, do_soft_reclaim);
        /*
-         * memcg iterator might race with other reclaimer or start from
-         * a incomplete tree walk so the tree walk in __shrink_zone
-         * might have missed groups that are above the soft limit. Try
-         * another loop to catch up with others. Do it just once to
-         * prevent from reclaim latencies when other reclaimers always
-         * preempt this one.
+        * memcg iterator might race with other reclaimer or start from
+        * a incomplete tree walk so the tree walk in __shrink_zone
+        * might have missed groups that are above the soft limit. Try
+        * another loop to catch up with others. Do it just once to
+        * prevent from reclaim latencies when other reclaimers always
+        * preempt this one.
         */
        if (do_soft_reclaim && !scanned_groups)
                __shrink_zone(zone, sc, do_soft_reclaim);