linux-kernel - [PATCH v2 2/2] mm/debug: sync up latest migrate_reason to migrate_reason

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Message-Id: <20210921064553.293905-3-o451686892@gmail.com>
Date:   Tue, 21 Sep 2021 14:45:53 +0800
From:   Weizhao Ouyang <o451686892@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        Michal Hocko <mhocko@...e.com>,
        John Hubbard <jhubbard@...dia.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>, Zi Yan <ziy@...dia.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Minchan Kim <minchan@...nel.org>,
        Weizhao Ouyang <o451686892@...il.com>,
        Mina Almasry <almasrymina@...gle.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        "Huang, Ying" <ying.huang@...el.com>,
        Oscar Salvador <osalvador@...e.de>, Wei Xu <weixugc@...gle.com>
Subject: [PATCH v2 2/2] mm/debug: sync up latest migrate_reason to migrate_reason_names

Sync up MR_DEMOTION to migrate_reason_names and add a synch prompt.

Fixes: 26aa2d199d6f ("mm/migrate: demote pages during reclaim")
Signed-off-by: Weizhao Ouyang <o451686892@...il.com>
Reviewed-by: "Huang, Ying" <ying.huang@...el.com>
---
 include/linux/migrate.h | 6 +++++-
 mm/debug.c              | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 326250996b4e..c8077e936691 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -19,6 +19,11 @@ struct migration_target_control;
  */
 #define MIGRATEPAGE_SUCCESS		0
 
+/*
+ * Keep sync with:
+ * - macro MIGRATE_REASON in include/trace/events/migrate.h
+ * - migrate_reason_names[MR_TYPES] in mm/debug.c
+ */
 enum migrate_reason {
 	MR_COMPACTION,
 	MR_MEMORY_FAILURE,
@@ -32,7 +37,6 @@ enum migrate_reason {
 	MR_TYPES
 };
 
-/* In mm/debug.c; also keep sync with include/trace/events/migrate.h */
 extern const char *migrate_reason_names[MR_TYPES];
 
 #ifdef CONFIG_MIGRATION
diff --git a/mm/debug.c b/mm/debug.c
index e61037cded98..fae0f81ad831 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -26,6 +26,7 @@ const char *migrate_reason_names[MR_TYPES] = {
 	"numa_misplaced",
 	"contig_range",
 	"longterm_pin",
+	"demotion",
 };
 
 const struct trace_print_flags pageflag_names[] = {
-- 
2.30.2