linux-kernel - [PATCH] mm/memory_hotplug: Print the correct pfn in do_migrate

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Message-Id: <20240924101555.327091-1-lizhijian@fujitsu.com>
Date: Tue, 24 Sep 2024 18:15:54 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-mm@...ck.org
Cc: David Hildenbrand <david@...hat.com>,
	Oscar Salvador <osalvador@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Li Zhijian <lizhijian@...itsu.com>
Subject: [PATCH] mm/memory_hotplug: Print the correct pfn in do_migrate_range()

The pfn value needs to be retrieved correctly when PageTransHuge(page)
is true. Fix it by replacing the usage of 'pfn' with 'page_to_pfn(page)'
to ensure the correct pfn is printed in warning messages when isolation
fails.

Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
 mm/memory_hotplug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 26790c8d5b43..000430406a9e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1829,7 +1829,7 @@ static void do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
 
 		} else {
 			if (__ratelimit(&migrate_rs)) {
-				pr_warn("failed to isolate pfn %lx\n", pfn);
+				pr_warn("failed to isolate pfn %lx\n", page_to_pfn(page));
 				dump_page(page, "isolation failed");
 			}
 		}
-- 
2.29.2