Messages in this thread Patch in this message |  | | | From | Tejun Heo <> | | Subject | [PATCH 4/5] backing-dev: update trace points | | Date | Mon, 6 Sep 2010 14:46:21 +0200 |
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* writeback_nothread is replaced with writeback_rescuer, which is triggered when a writeback work is called from the bdi_wq rescuer.
* writeback_wake[_forker]_thread are replaced with writeback_timer.
* writeback_thread_start/stop are replaced with writeback_start/stop which are triggered when a writeback work starts and finishes execution.
Signed-off-by: Tejun Heo <tj@kernel.org> --- include/trace/events/writeback.h | 9 ++++----- mm/backing-dev.c | 6 ++++++ 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index f345f66..58e1f01 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -46,7 +46,7 @@ DECLARE_EVENT_CLASS(writeback_work_class, DEFINE_EVENT(writeback_work_class, name, \ TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \ TP_ARGS(bdi, work)) -DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread); +DEFINE_WRITEBACK_WORK_EVENT(writeback_rescuer); DEFINE_WRITEBACK_WORK_EVENT(writeback_queue); DEFINE_WRITEBACK_WORK_EVENT(writeback_exec); @@ -81,12 +81,11 @@ 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_timer); DEFINE_WRITEBACK_EVENT(writeback_bdi_register); DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister); -DEFINE_WRITEBACK_EVENT(writeback_thread_start); -DEFINE_WRITEBACK_EVENT(writeback_thread_stop); +DEFINE_WRITEBACK_EVENT(writeback_start); +DEFINE_WRITEBACK_EVENT(writeback_stop); DECLARE_EVENT_CLASS(wbc_class, TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), diff --git a/mm/backing-dev.c b/mm/backing-dev.c index e874916..3b2a657 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -314,6 +314,7 @@ static void bdi_timer_fn(unsigned long data) { struct backing_dev_info *bdi = (struct backing_dev_info *)data; + trace_writeback_timer(bdi); queue_work(bdi_wq, &bdi->wb.work); } @@ -347,6 +348,8 @@ static void bdi_work_fn(struct work_struct *work) struct backing_dev_info *bdi = wb->bdi; long pages_written; + trace_writeback_start(bdi); + WARN(!test_bit(BDI_registered, &bdi->state), "bdi %p/%s is not registered!\n", bdi, bdi->name); @@ -369,6 +372,7 @@ static void bdi_work_fn(struct work_struct *work) trace_writeback_pages_written(pages_written); } while (!list_empty(&bdi->work_list)); } else { + trace_writeback_rescuer(bdi, work); bdi_flush_io(bdi); if (!list_empty(&bdi->work_list)) queue_work(bdi_wq, work); @@ -378,6 +382,8 @@ static void bdi_work_fn(struct work_struct *work) bdi_delayed_writeback(bdi); current->flags &= ~(PF_FLUSHER | PF_SWAPWRITE); + + trace_writeback_stop(bdi); } /* -- 1.7.1
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