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| author | Hannes Reinecke <hare@suse.de> | 2020-05-19 11:14:20 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-05-21 00:09:49 +0300 |
| commit | 34f5affd04c4a16d9df19c369bcec6e873e57ffe (patch) | |
| tree | 73da1a362f1bfd5a3f4d3bee186e81e536a46a2b /drivers/md/dm-zoned.h | |
| parent | 489dc0f06a5837f87482c0ce61d830d24e17082e (diff) | |
| download | linux-34f5affd04c4a16d9df19c369bcec6e873e57ffe.tar.xz | |
dm zoned: separate random and cache zones
Instead of lumping emulated zones together with random zones we
should be handling them as separate 'cache' zones. This improves
code readability and allows an easier implementation of different
cache policies.
Also add additional allocation flags, to separate the type (cache,
random, or sequential) from the purpose (eg reclaim).
Also switch the allocation policy to not use random zones as buffer
zones if cache zones are present. This avoids a performance drop when
all cache zones are used.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-zoned.h')
| -rw-r--r-- | drivers/md/dm-zoned.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h index 4971a765be55..29e01a853f84 100644 --- a/drivers/md/dm-zoned.h +++ b/drivers/md/dm-zoned.h @@ -111,6 +111,7 @@ struct dm_zone { */ enum { /* Zone write type */ + DMZ_CACHE, DMZ_RND, DMZ_SEQ, @@ -131,6 +132,7 @@ enum { /* * Zone data accessors. */ +#define dmz_is_cache(z) test_bit(DMZ_CACHE, &(z)->flags) #define dmz_is_rnd(z) test_bit(DMZ_RND, &(z)->flags) #define dmz_is_seq(z) test_bit(DMZ_SEQ, &(z)->flags) #define dmz_is_empty(z) ((z)->wp_block == 0) @@ -189,7 +191,9 @@ bool dmz_check_dev(struct dmz_metadata *zmd); bool dmz_dev_is_dying(struct dmz_metadata *zmd); #define DMZ_ALLOC_RND 0x01 -#define DMZ_ALLOC_RECLAIM 0x02 +#define DMZ_ALLOC_CACHE 0x02 +#define DMZ_ALLOC_SEQ 0x04 +#define DMZ_ALLOC_RECLAIM 0x10 struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags); void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone); @@ -198,6 +202,8 @@ void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone, unsigned int chunk); void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone); unsigned int dmz_nr_zones(struct dmz_metadata *zmd); +unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd); +unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd); |