diff mbox series

[2/2] tracing, vmscan: add comments for perf script page-reclaim

Message ID 1568817522-8754-3-git-send-email-laoar.shao@gmail.com (mailing list archive)
State New, archived
Headers show
Series introduce new perf-script page-reclaim | expand

Commit Message

Yafang Shao Sept. 18, 2019, 2:38 p.m. UTC 
Currently there's no easy way to make perf scripts in sync with
tracepoints. One possible way is to run perf's tests regularly, another way
is once we changes the definitions of tracepoints we must keep in mind that
the perf scripts which are using these tracepoints must be changed as well.
So I add this comment for the new introduced page-reclaim script as a
reminder.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 include/trace/events/vmscan.h | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index a5ab297..f0447ad 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -1,4 +1,17 @@ 
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Bellow tracepoints are used by perf script page-reclaim:
+ *	mm_vmscan_direct_reclaim_begin
+ *	mm_vmscan_direct_reclaim_end
+ *	mm_vmscan_kswapd_wake
+ *	mm_vmscan_kswapd_sleep
+ *	mm_vmscan_wakeup_kswapd
+ *	mm_vmscan_lru_shrink_inactive
+ *	mm_vmscan_writepage
+ * We must keep the definitions of these tracepoints in sync with the perf
+ * script page-reclaim.
+ */
+
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM vmscan