Re: [PATCH 04/12] dm-zoned: secondary superblock must reside on the same devices than primary superblock

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On 2020/05/23 0:39, Hannes Reinecke wrote:
> The secondary superblock must reside on the same device than the
> primary superblock, so there's no need to re-calculate the device.
> 
> Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
> ---
>  drivers/md/dm-zoned-metadata.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
> index b70a988fa771..fdae4e0228e7 100644
> --- a/drivers/md/dm-zoned-metadata.c
> +++ b/drivers/md/dm-zoned-metadata.c
> @@ -1141,7 +1141,7 @@ static int dmz_lookup_secondary_sb(struct dmz_metadata *zmd)
>  	/* Bad first super block: search for the second one */
>  	zmd->sb[1].block = zmd->sb[0].block + zone_nr_blocks;
>  	zmd->sb[1].zone = xa_load(&zmd->zones, zone_id + 1);
> -	zmd->sb[1].dev = dmz_zone_to_dev(zmd, zmd->sb[1].zone);
> +	zmd->sb[1].dev = zmd->sb[0].dev;
>  	for (i = 1; i < zmd->nr_rnd_zones; i++) {
>  		if (dmz_read_sb(zmd, &zmd->sb[1], 1) != 0)
>  			break;
> @@ -1149,7 +1149,6 @@ static int dmz_lookup_secondary_sb(struct dmz_metadata *zmd)
>  			return 0;
>  		zmd->sb[1].block += zone_nr_blocks;
>  		zmd->sb[1].zone = dmz_get(zmd, zone_id + i);
> -		zmd->sb[1].dev = dmz_zone_to_dev(zmd, zmd->sb[1].zone);
>  	}
>  
>  	dmz_free_mblock(zmd, mblk);
> @@ -1272,7 +1271,7 @@ static int dmz_load_sb(struct dmz_metadata *zmd)
>  			zmd->sb[1].zone = dmz_get(zmd, zone_id);
>  		}
>  		zmd->sb[1].block = dmz_start_block(zmd, zmd->sb[1].zone);
> -		zmd->sb[1].dev = dmz_zone_to_dev(zmd, zmd->sb[1].zone);
> +		zmd->sb[1].dev = zmd->sb[0].dev;
>  		ret = dmz_get_sb(zmd, &zmd->sb[1], 1);
>  	} else
>  		ret = dmz_lookup_secondary_sb(zmd);
> 

Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx>

-- 
Damien Le Moal
Western Digital Research



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