mm: compaction: add missing kcompactd wakeup trace event

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.

Link: https://lkml.kernel.org/r/cbf8097a2d8a1b6800991f2a21575550d3613ce6.1673342761.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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);
 		}
 	}