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

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Message-ID: <aBB_9lCUGpD1uKif@kernel.org>
Date: Tue, 29 Apr 2025 10:29:58 +0300
From: Mike Rapoport <rppt@...nel.org>
To: Ye Liu <ye.liu@...ux.dev>
Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.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
Subject: Re: [PATCH 2/3] mm/debug_page_alloc: improve error message for
 invalid guardpage minorder

On Sun, Apr 27, 2025 at 06:04:41PM +0800, Ye Liu wrote:
> 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>

Acked-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

> ---
>  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
> 

-- 
Sincerely yours,
Mike.