linux-kernel - [PATCH 2/3] mm/debug_page_alloc: improve error message for invalid guardpage minorder

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Message-Id: <20250427100442.958352-3-ye.liu@linux.dev>
Date: Sun, 27 Apr 2025 18:04:41 +0800
From: Ye Liu <ye.liu@...ux.dev>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	rppt@...nel.org,
	lorenzo.stoakes@...cle.com,
	Liam.Howlett@...cle.com,
	david@...hat.com,
	harry.yoo@...cle.com,
	riel@...riel.com,
	vbabka@...e.cz,
	liuye@...inos.cn,
	ye.liu@...ux.dev
Subject: [PATCH 2/3] mm/debug_page_alloc: improve error message for invalid guardpage minorder

From: Ye Liu <liuye@...inos.cn>

When an invalid debug_guardpage_minorder value is provided, include the
user input in the error message. This helps users and developers diagnose
configuration issues more easily.

No functional change.

Signed-off-by: Ye Liu <liuye@...inos.cn>
---
 mm/debug_page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/debug_page_alloc.c b/mm/debug_page_alloc.c
index d46acf989dde..6a26eca546c3 100644
--- a/mm/debug_page_alloc.c
+++ b/mm/debug_page_alloc.c
@@ -23,7 +23,7 @@ static int __init debug_guardpage_minorder_setup(char *buf)
 	unsigned long res;
 
 	if (kstrtoul(buf, 10, &res) < 0 ||  res > MAX_PAGE_ORDER / 2) {
-		pr_err("Bad debug_guardpage_minorder value\n");
+		pr_err("Bad debug_guardpage_minorder value: %s\n", buf);
 		return 0;
 	}
 	_debug_guardpage_minorder = res;
-- 
2.25.1