diff options
| -rw-r--r-- | include/trace/events/memcg.h | 25 | ||||
| -rw-r--r-- | mm/memcontrol.c | 7 |
2 files changed, 31 insertions, 1 deletions
diff --git a/include/trace/events/memcg.h b/include/trace/events/memcg.h index 8667e57816d2..dfe2f51019b4 100644 --- a/include/trace/events/memcg.h +++ b/include/trace/events/memcg.h @@ -74,6 +74,31 @@ DEFINE_EVENT(memcg_rstat_events, count_memcg_events, TP_ARGS(memcg, item, val) ); +TRACE_EVENT(memcg_flush_stats, + + TP_PROTO(struct mem_cgroup *memcg, s64 stats_updates, + bool force, bool needs_flush), + + TP_ARGS(memcg, stats_updates, force, needs_flush), + + TP_STRUCT__entry( + __field(u64, id) + __field(s64, stats_updates) + __field(bool, force) + __field(bool, needs_flush) + ), + + TP_fast_assign( + __entry->id = cgroup_id(memcg->css.cgroup); + __entry->stats_updates = stats_updates; + __entry->force = force; + __entry->needs_flush = needs_flush; + ), + + TP_printk("memcg_id=%llu stats_updates=%lld force=%d needs_flush=%d", + __entry->id, __entry->stats_updates, + __entry->force, __entry->needs_flush) +); #endif /* _TRACE_MEMCG_H */ diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a4da834b4aa3..6486e9652843 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -597,7 +597,12 @@ static inline void memcg_rstat_updated(struct mem_cgroup *memcg, int val) static void __mem_cgroup_flush_stats(struct mem_cgroup *memcg, bool force) { - if (!force && !memcg_vmstats_needs_flush(memcg->vmstats)) + bool needs_flush = memcg_vmstats_needs_flush(memcg->vmstats); + + trace_memcg_flush_stats(memcg, atomic64_read(&memcg->vmstats->stats_updates), + force, needs_flush); + + if (!force && !needs_flush) return; if (mem_cgroup_is_root(memcg)) |