linux-kernel - Re: [PATCH v2] memblock: Add flags and nid info in memblock debugfs

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Message-ID: <ZGTaF801Pjs+M48x@kernel.org>
Date:   Wed, 17 May 2023 16:43:51 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Yuwei Guan <ssawgyw@...il.com>
Cc:     akpm@...ux-foundation.org, tsahu@...ux.ibm.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] memblock: Add flags and nid info in memblock debugfs

On Wed, May 17, 2023 at 10:57:47AM +0800, Yuwei Guan wrote:
> Currently, the memblock debugfs can display the count of memblock_type and
> the base and end of the reg. However, when the following scenario occurs,
> the information in the existing debugfs cannot make it clear why the
> address is not consecutive.

...
 
> diff --git a/mm/memblock.c b/mm/memblock.c
> index 511d4783dcf1..b36fb6b31e0f 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -2144,12 +2144,16 @@ static int memblock_debug_show(struct seq_file *m, void *private)
>  	int i;
>  	phys_addr_t end;
>  
> +	seq_puts(m, "cnt\tbase..end\tflags\tnid\n");
> +
>  	for (i = 0; i < type->cnt; i++) {
>  		reg = &type->regions[i];
>  		end = reg->base + reg->size - 1;
>  
> -		seq_printf(m, "%4d: ", i);
> -		seq_printf(m, "%pa..%pa\n", &reg->base, &end);
> +		seq_printf(m, "%d:\t", i);
> +		seq_printf(m, "%pa..%pa\t", &reg->base, &end);
> +		seq_printf(m, "0x%x\t", reg->flags);
> +		seq_printf(m, "0x%x\n", memblock_get_region_node(reg));

Please use "%4d" for nid.

>  	}
>  	return 0;
>  }
> -- 
> 2.34.1
> 

-- 
Sincerely yours,
Mike.