linux-kernel - [PATCH 1/2] mm/mm_init.c: move set_pageblock_order() to free_area

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Message-Id: <20230601063536.26882-1-haifeng.xu@shopee.com>
Date:   Thu,  1 Jun 2023 06:35:35 +0000
From:   Haifeng Xu <haifeng.xu@...pee.com>
To:     rppt@...nel.org
Cc:     mhocko@...nel.org, akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Haifeng Xu <haifeng.xu@...pee.com>
Subject: [PATCH 1/2] mm/mm_init.c: move set_pageblock_order() to free_area_init()

pageblock_order only needs to be set once, there is no need to
initialize it in every zone/node.

Signed-off-by: Haifeng Xu <haifeng.xu@...pee.com>
---
 mm/mm_init.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/mm_init.c b/mm/mm_init.c
index 93821824271a..232efac9a929 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -1583,7 +1583,6 @@ static void __init free_area_init_core(struct pglist_data *pgdat)
 		if (!size)
 			continue;
 
-		set_pageblock_order();
 		setup_usemap(zone);
 		init_currently_empty_zone(zone, zone->zone_start_pfn, size);
 	}
@@ -1850,6 +1849,8 @@ void __init free_area_init(unsigned long *max_zone_pfn)
 	/* Initialise every node */
 	mminit_verify_pageflags_layout();
 	setup_nr_node_ids();
+	set_pageblock_order();
+
 	for_each_node(nid) {
 		pg_data_t *pgdat;
 
-- 
2.25.1