Add missing kcompactd wakeup trace event for proactive compaction, meanwhile
use order = -1 and the highest zone index of the pgdat for the kcompactd wakeup
trace event by proactive compaction.

Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
---
 mm/compaction.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/compaction.c b/mm/compaction.c
index 62f6bb68c9cb..0fd6c81a7809 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -2730,6 +2730,8 @@ int compaction_proactiveness_sysctl_handler(struct ctl_table *table, int write,
 				continue;
 
 			pgdat->proactive_compact_trigger = true;
+			trace_mm_compaction_wakeup_kcompactd(pgdat->node_id, -1,
+							     pgdat->nr_zones - 1);
 			wake_up_interruptible(&pgdat->kcompactd_wait);
 		}
 	}
-- 
2.27.0