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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2010-07-25 14:29:24 +0300 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:53:56 +0200 |
| commit | 603320239fb436f175c8b6bfa43d5023c47a6dc2 (patch) | |
| tree | efe1e78de6c2b8029cdcdcad2e98e3ef6c017900 /include/trace | |
| parent | b5048a6cb5455a16bdff26a4c5ae9534f070d94c (diff) | |
| download | linux-3.10-603320239fb436f175c8b6bfa43d5023c47a6dc2.tar.gz linux-3.10-603320239fb436f175c8b6bfa43d5023c47a6dc2.tar.bz2 linux-3.10-603320239fb436f175c8b6bfa43d5023c47a6dc2.zip | |
writeback: add new tracepoints
Add 2 new trace points to the periodic write-back wake up case, just like we do
in the 'bdi_queue_work()' function. Namely, introduce:
1. trace_writeback_wake_thread(bdi)
2. trace_writeback_wake_forker_thread(bdi)
The first event is triggered every time we wake up a bdi thread to start
periodic background write-out. The second event is triggered only when the bdi
thread does not exist and should be created by the forker thread.
This patch was suggested by Dave Chinner and Christoph Hellwig.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/writeback.h | 2 |
1 files changed, 2 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); |