diff options
| -rw-r--r-- | mm/memcontrol.c | 73 |
1 files changed, 35 insertions, 38 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 42174612cc0..abb66a2cba6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -748,37 +748,32 @@ static unsigned long mem_cgroup_nr_lru_pages(struct mem_cgroup *memcg, return total; } -static bool __memcg_event_check(struct mem_cgroup *memcg, int target) +static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg, + enum mem_cgroup_events_target target) { unsigned long val, next; val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]); next = __this_cpu_read(memcg->stat->targets[target]); /* from time_after() in jiffies.h */ - return ((long)next - (long)val < 0); -} - -static void __mem_cgroup_target_update(struct mem_cgroup *memcg, int target) -{ - unsigned long val, next; - - val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]); - - switch (target) { - case MEM_CGROUP_TARGET_THRESH: - next = val + THRESHOLDS_EVENTS_TARGET; - break; - case MEM_CGROUP_TARGET_SOFTLIMIT: - next = val + SOFTLIMIT_EVENTS_TARGET; - break; - case MEM_CGROUP_TARGET_NUMAINFO: - next = val + NUMAINFO_EVENTS_TARGET; - break; - default: - return; + if ((long)next - (long)val < 0) { + switch (target) { + case MEM_CGROUP_TARGET_THRESH: + next = val + THRESHOLDS_EVENTS_TARGET; + break; + case MEM_CGROUP_TARGET_SOFTLIMIT: + next = val + SOFTLIMIT_EVENTS_TARGET; + break; + case MEM_CGROUP_TARGET_NUMAINFO: + next = val + NUMAINFO_EVENTS_TARGET; + break; + default: + break; + } + __this_cpu_write(memcg->stat->targets[target], next); + return true; } - - __this_cpu_write(memcg->stat->targets[target], next); + return false; } /* @@ -789,25 +784,27 @@ static void memcg_check_events(struct mem_cgroup *memcg, struct page *page) { preempt_disable(); /* threshold event is triggered in finer grain than soft limit */ - if (unlikely(__memcg_event_check(memcg, MEM_CGROUP_TARGET_THRESH))) { + if (unlikely(mem_cgroup_event_ratelimit(memcg, + MEM_CGROUP_TARGET_THRESH))) { + bool do_softlimit, do_numainfo; + + do_softlimit = mem_cgroup_event_ratelimit(memcg, + MEM_CGROUP_TARGET_SOFTLIMIT); +#if MAX_NUMNODES > 1 + do_numainfo = mem_cgroup_event_ratelimit(memcg, + MEM_CGROUP_TARGET_NUMAINFO); +#endif + preempt_enable(); + mem_cgroup_threshold(memcg); - __mem_cgroup_target_update(memcg, MEM_CGROUP_TARGET_THRESH); - if (unlikely(__memcg_event_check(memcg, - MEM_CGROUP_TARGET_SOFTLIMIT))) { + if (unlikely(do_softlimit)) mem_cgroup_update_tree(memcg, page); - __mem_cgroup_target_update(memcg, - MEM_CGROUP_TARGET_SOFTLIMIT); - } #if MAX_NUMNODES > 1 - if (unlikely(__memcg_event_check(memcg, - MEM_CGROUP_TARGET_NUMAINFO))) { + if (unlikely(do_numainfo)) atomic_inc(&memcg->numainfo_events); - __mem_cgroup_target_update(memcg, - MEM_CGROUP_TARGET_NUMAINFO); - } #endif - } - preempt_enable(); + } else + preempt_enable(); } struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont) |