linux-kernel - [PATCH 4/8] mm/migrate: add MR_DAMON to migrate

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Message-ID: <20240613131741.513-5-honggyu.kim@sk.com>
Date: Thu, 13 Jun 2024 22:17:35 +0900
From: Honggyu Kim <honggyu.kim@...com>
To: SeongJae Park <sj@...nel.org>,
	damon@...ts.linux.dev
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Gregory Price <gregory.price@...verge.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	42.hyeyoo@...il.com,
	art.jeongseob@...il.com,
	kernel_team@...ynix.com,
	Honggyu Kim <honggyu.kim@...com>
Subject: [PATCH 4/8] mm/migrate: add MR_DAMON to migrate_reason

The current patch series introduces DAMON based migration across NUMA
nodes so it'd be better to have a new migrate_reason in trace events.

Signed-off-by: Honggyu Kim <honggyu.kim@...com>
Reviewed-by: SeongJae Park <sj@...nel.org>
Signed-off-by: SeongJae Park <sj@...nel.org>
---
 include/linux/migrate_mode.h   | 1 +
 include/trace/events/migrate.h | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/migrate_mode.h b/include/linux/migrate_mode.h
index f37cc03f9369..cec36b7e7ced 100644
--- a/include/linux/migrate_mode.h
+++ b/include/linux/migrate_mode.h
@@ -29,6 +29,7 @@ enum migrate_reason {
 	MR_CONTIG_RANGE,
 	MR_LONGTERM_PIN,
 	MR_DEMOTION,
+	MR_DAMON,
 	MR_TYPES
 };
 
diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h
index 0190ef725b43..cd01dd7b3640 100644
--- a/include/trace/events/migrate.h
+++ b/include/trace/events/migrate.h
@@ -22,7 +22,8 @@
 	EM( MR_NUMA_MISPLACED,	"numa_misplaced")		\
 	EM( MR_CONTIG_RANGE,	"contig_range")			\
 	EM( MR_LONGTERM_PIN,	"longterm_pin")			\
-	EMe(MR_DEMOTION,	"demotion")
+	EM( MR_DEMOTION,	"demotion")			\
+	EMe(MR_DAMON,		"damon")
 
 /*
  * First define the enums in the above macros to be exported to userspace
-- 
2.34.1