linux-kernel - Re: [PATCH 3/3] slub: Actually use 'message' in restore

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Date:   Thu, 20 May 2021 12:02:09 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Stephen Boyd <swboyd@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>, linux-mm@...ck.org
Subject: Re: [PATCH 3/3] slub: Actually use 'message' in restore_bytes()

On 5/20/21 3:35 AM, Stephen Boyd wrote:
> The message argument isn't used here. Let's pass the string to the
> printk message so that the developer can figure out what's happening,
> instead of guessing that a redzone is being restored, etc.
> 
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>

Reviewed-by: Vlastimil Babka <vbabka@...e.cz>

> ---
>  mm/slub.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/slub.c b/mm/slub.c
> index 87eeeed1f369..16e8e8f8dc0c 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -777,7 +777,7 @@ static void init_object(struct kmem_cache *s, void *object, u8 val)
>  static void restore_bytes(struct kmem_cache *s, char *message, u8 data,
>  						void *from, void *to)
>  {
> -	slab_fix(s, "Restoring 0x%px-0x%px=0x%x\n", from, to - 1, data);
> +	slab_fix(s, "Restoring %s 0x%px-0x%px=0x%x\n", message, from, to - 1, data);
>  	memset(from, data, to - from);
>  }
>  
>