diff options
| -rw-r--r-- | include/trace/events/writeback.h | 2 | ||||
| -rw-r--r-- | mm/backing-dev.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 84ab72df953..f345f66ae9d 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -81,6 +81,8 @@ DEFINE_EVENT(writeback_class, name, \ TP_ARGS(bdi)) DEFINE_WRITEBACK_EVENT(writeback_nowork); +DEFINE_WRITEBACK_EVENT(writeback_wake_thread); +DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread); DEFINE_WRITEBACK_EVENT(writeback_bdi_register); DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister); DEFINE_WRITEBACK_EVENT(writeback_thread_start); diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 99890831d55..9008c4e207f 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -310,6 +310,7 @@ static void wakeup_timer_fn(unsigned long data) spin_lock_bh(&bdi->wb_lock); if (bdi->wb.task) { + trace_writeback_wake_thread(bdi); wake_up_process(bdi->wb.task); } else { /* @@ -317,6 +318,7 @@ static void wakeup_timer_fn(unsigned long data) * In this case we have to wake-up the forker thread which * should create and run the bdi thread. */ + trace_writeback_wake_forker_thread(bdi); wake_up_process(default_backing_dev_info.wb.task); } spin_unlock_bh(&bdi->wb_lock); |