On 2020/05/23 0:39, Hannes Reinecke wrote:
> Instead of counting the number of reserved zones in dmz_free_zone()
> we should mark the zone as 'reserved' during allocation and simplify
> dmz_free_zone().
>
> Signed-off-by: Hannes Reinecke <h...@suse.de>
> ---
> drivers/md/dm-zoned-metadata.c | 4 ++--
> drivers/md/dm-zoned.h | 2 ++
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
> index 73479b4c8bca..1b9da698a812 100644
> --- a/drivers/md/dm-zoned-metadata.c
> +++ b/drivers/md/dm-zoned-metadata.c
> @@ -1783,6 +1783,7 @@ static int dmz_load_mapping(struct dmz_metadata *zmd)
> atomic_inc(&zmd->unmap_nr_rnd);
> } else if (atomic_read(&zmd->nr_reserved_seq_zones) <
> zmd->nr_reserved_seq) {
> list_add_tail(&dzone->link,
> &zmd->reserved_seq_zones_list);
> + set_bit(DMZ_RESERVED, &dzone->flags);
> atomic_inc(&zmd->nr_reserved_seq_zones);
> zmd->nr_seq--;
> } else {
> @@ -2210,8 +2211,7 @@ void dmz_free_zone(struct dmz_metadata *zmd, struct
> dm_zone *zone)
> } else if (dmz_is_rnd(zone)) {
> list_add_tail(&zone->link, &zmd->unmap_rnd_list);
> atomic_inc(&zmd->unmap_nr_rnd);
> - } else if (atomic_read(&zmd->nr_reserved_seq_zones) <
> - zmd->nr_reserved_seq) {
> + } else if (dmz_is_reserved(zone)) {
> list_add_tail(&zone->link, &zmd->reserved_seq_zones_list);
> atomic_inc(&zmd->nr_reserved_seq_zones);
> } else {
> diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
> index dab701893b67..983f5b5e9fa0 100644
> --- a/drivers/md/dm-zoned.h
> +++ b/drivers/md/dm-zoned.h
> @@ -130,6 +130,7 @@ enum {
> DMZ_META,
> DMZ_DATA,
> DMZ_BUF,
> + DMZ_RESERVED,
>
> /* Zone internal state */
> DMZ_RECLAIM,
> @@ -147,6 +148,7 @@ enum {
> #define dmz_is_offline(z) test_bit(DMZ_OFFLINE, &(z)->flags)
> #define dmz_is_readonly(z) test_bit(DMZ_READ_ONLY, &(z)->flags)
> #define dmz_in_reclaim(z) test_bit(DMZ_RECLAIM, &(z)->flags)
> +#define dmz_is_reserved(z) test_bit(DMZ_RESERVED, &(z)->flags)
> #define dmz_seq_write_err(z) test_bit(DMZ_SEQ_WRITE_ERR, &(z)->flags)
> #define dmz_reclaim_should_terminate(z) \
> test_bit(DMZ_RECLAIM_TERMINATE, &(z)->flags)
>
Reviewed-by: Damien Le Moal <damien.lem...@wdc.com>
--
Damien Le Moal
Western Digital Research
--
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