---

yaml --- r: 208345 b: refs/heads/master c: 6033202 h: refs/heads/master i: 208343: 614c4fd v: v3
git-mirror · Aug 7, 2010 · 2a8ea66 · 2a8ea66
1 parent 51f95cb
commit 2a8ea66
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Showing 3 changed files with 5 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b5048a6cb5455a16bdff26a4c5ae9534f070d94c
+refs/heads/master: 603320239fb436f175c8b6bfa43d5023c47a6dc2
diff --git a/trunk/include/trace/events/writeback.h b/trunk/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/trunk/mm/backing-dev.c b/trunk/mm/backing-dev.c
@@ -310,13 +310,15 @@ 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 {
 		/*
 		 * When bdi tasks are inactive for long time, they are killed.
 		 * 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);