[dm-devel] [PATCH 10/15] dm-zoned: move random and sequential zones into struct dmz_dev
Hannes Reinecke
hare at suse.de
Tue Jun 2 11:09:51 UTC 2020
Random and sequential zones should be part of the respective
device structure to make arbitration between devices possible.
Signed-off-by: Hannes Reinecke <hare at suse.de>
Reviewed-by: Damien Le Moal <damien.lemoal at wdc.com>
---
drivers/md/dm-zoned-metadata.c | 139 +++++++++++++++++++++++------------------
drivers/md/dm-zoned-reclaim.c | 15 +++--
drivers/md/dm-zoned-target.c | 25 ++++++--
drivers/md/dm-zoned.h | 18 ++++--
4 files changed, 119 insertions(+), 78 deletions(-)
diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index e22db3f19422..044c152eb756 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -192,21 +192,12 @@ struct dmz_metadata {
/* Zone allocation management */
struct mutex map_lock;
struct dmz_mblock **map_mblk;
- unsigned int nr_rnd;
- atomic_t unmap_nr_rnd;
- struct list_head unmap_rnd_list;
- struct list_head map_rnd_list;
unsigned int nr_cache;
atomic_t unmap_nr_cache;
struct list_head unmap_cache_list;
struct list_head map_cache_list;
- unsigned int nr_seq;
- atomic_t unmap_nr_seq;
- struct list_head unmap_seq_list;
- struct list_head map_seq_list;
-
atomic_t nr_reserved_seq_zones;
struct list_head reserved_seq_zones_list;
@@ -279,14 +270,14 @@ unsigned int dmz_nr_chunks(struct dmz_metadata *zmd)
return zmd->nr_chunks;
}
-unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx)
{
- return zmd->nr_rnd;
+ return zmd->dev[idx].nr_rnd;
}
-unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx)
{
- return atomic_read(&zmd->unmap_nr_rnd);
+ return atomic_read(&zmd->dev[idx].unmap_nr_rnd);
}
unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd)
@@ -299,14 +290,14 @@ unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd)
return atomic_read(&zmd->unmap_nr_cache);
}
-unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx)
{
- return zmd->nr_seq;
+ return zmd->dev[idx].nr_seq;
}
-unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx)
{
- return atomic_read(&zmd->unmap_nr_seq);
+ return atomic_read(&zmd->dev[idx].unmap_nr_seq);
}
static struct dm_zone *dmz_get(struct dmz_metadata *zmd, unsigned int zone_id)
@@ -1498,6 +1489,14 @@ static int dmz_init_zones(struct dmz_metadata *zmd)
dev->metadata = zmd;
zmd->nr_zones += dev->nr_zones;
+
+ atomic_set(&dev->unmap_nr_rnd, 0);
+ INIT_LIST_HEAD(&dev->unmap_rnd_list);
+ INIT_LIST_HEAD(&dev->map_rnd_list);
+
+ atomic_set(&dev->unmap_nr_seq, 0);
+ INIT_LIST_HEAD(&dev->unmap_seq_list);
+ INIT_LIST_HEAD(&dev->map_seq_list);
}
if (!zmd->nr_zones) {
@@ -1718,9 +1717,9 @@ static int dmz_load_mapping(struct dmz_metadata *zmd)
if (dmz_is_cache(dzone))
list_add_tail(&dzone->link, &zmd->map_cache_list);
else if (dmz_is_rnd(dzone))
- list_add_tail(&dzone->link, &zmd->map_rnd_list);
+ list_add_tail(&dzone->link, &dzone->dev->map_rnd_list);
else
- list_add_tail(&dzone->link, &zmd->map_seq_list);
+ list_add_tail(&dzone->link, &dzone->dev->map_seq_list);
/* Check buffer zone */
bzone_id = le32_to_cpu(dmap[e].bzone_id);
@@ -1754,7 +1753,7 @@ static int dmz_load_mapping(struct dmz_metadata *zmd)
if (dmz_is_cache(bzone))
list_add_tail(&bzone->link, &zmd->map_cache_list);
else
- list_add_tail(&bzone->link, &zmd->map_rnd_list);
+ list_add_tail(&bzone->link, &bzone->dev->map_rnd_list);
next:
chunk++;
e++;
@@ -1779,9 +1778,9 @@ static int dmz_load_mapping(struct dmz_metadata *zmd)
if (dmz_is_cache(dzone))
zmd->nr_cache++;
else if (dmz_is_rnd(dzone))
- zmd->nr_rnd++;
+ dzone->dev->nr_rnd++;
else
- zmd->nr_seq++;
+ dzone->dev->nr_seq++;
if (dmz_is_data(dzone)) {
/* Already initialized */
@@ -1795,16 +1794,18 @@ static int dmz_load_mapping(struct dmz_metadata *zmd)
list_add_tail(&dzone->link, &zmd->unmap_cache_list);
atomic_inc(&zmd->unmap_nr_cache);
} else if (dmz_is_rnd(dzone)) {
- list_add_tail(&dzone->link, &zmd->unmap_rnd_list);
- atomic_inc(&zmd->unmap_nr_rnd);
+ list_add_tail(&dzone->link,
+ &dzone->dev->unmap_rnd_list);
+ atomic_inc(&dzone->dev->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--;
+ dzone->dev->nr_seq--;
} else {
- list_add_tail(&dzone->link, &zmd->unmap_seq_list);
- atomic_inc(&zmd->unmap_nr_seq);
+ list_add_tail(&dzone->link,
+ &dzone->dev->unmap_seq_list);
+ atomic_inc(&dzone->dev->unmap_nr_seq);
}
}
@@ -1838,13 +1839,13 @@ static void __dmz_lru_zone(struct dmz_metadata *zmd, struct dm_zone *zone)
list_del_init(&zone->link);
if (dmz_is_seq(zone)) {
/* LRU rotate sequential zone */
- list_add_tail(&zone->link, &zmd->map_seq_list);
+ list_add_tail(&zone->link, &zone->dev->map_seq_list);
} else if (dmz_is_cache(zone)) {
/* LRU rotate cache zone */
list_add_tail(&zone->link, &zmd->map_cache_list);
} else {
/* LRU rotate random zone */
- list_add_tail(&zone->link, &zmd->map_rnd_list);
+ list_add_tail(&zone->link, &zone->dev->map_rnd_list);
}
}
@@ -1926,14 +1927,24 @@ static struct dm_zone *dmz_get_rnd_zone_for_reclaim(struct dmz_metadata *zmd,
{
struct dm_zone *dzone = NULL;
struct dm_zone *zone;
- struct list_head *zone_list = &zmd->map_rnd_list;
+ struct list_head *zone_list;
/* If we have cache zones select from the cache zone list */
if (zmd->nr_cache) {
zone_list = &zmd->map_cache_list;
/* Try to relaim random zones, too, when idle */
- if (idle && list_empty(zone_list))
- zone_list = &zmd->map_rnd_list;
+ if (idle && list_empty(zone_list)) {
+ int i;
+
+ for (i = 1; i < zmd->nr_devs; i++) {
+ zone_list = &zmd->dev[i].map_rnd_list;
+ if (!list_empty(zone_list))
+ break;
+ }
+ }
+ } else {
+ /* Otherwise the random zones are on the first disk */
+ zone_list = &zmd->dev[0].map_rnd_list;
}
list_for_each_entry(zone, zone_list, link) {
@@ -1954,12 +1965,17 @@ static struct dm_zone *dmz_get_rnd_zone_for_reclaim(struct dmz_metadata *zmd,
static struct dm_zone *dmz_get_seq_zone_for_reclaim(struct dmz_metadata *zmd)
{
struct dm_zone *zone;
+ int i;
- list_for_each_entry(zone, &zmd->map_seq_list, link) {
- if (!zone->bzone)
- continue;
- if (dmz_lock_zone_reclaim(zone))
- return zone;
+ for (i = 0; i < zmd->nr_devs; i++) {
+ struct dmz_dev *dev = &zmd->dev[i];
+
+ list_for_each_entry(zone, &dev->map_seq_list, link) {
+ if (!zone->bzone)
+ continue;
+ if (dmz_lock_zone_reclaim(zone))
+ return zone;
+ }
}
return NULL;
@@ -2145,7 +2161,7 @@ struct dm_zone *dmz_get_chunk_buffer(struct dmz_metadata *zmd,
if (dmz_is_cache(bzone))
list_add_tail(&bzone->link, &zmd->map_cache_list);
else
- list_add_tail(&bzone->link, &zmd->map_rnd_list);
+ list_add_tail(&bzone->link, &bzone->dev->map_rnd_list);
out:
dmz_unlock_map(zmd);
@@ -2160,21 +2176,27 @@ struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags)
{
struct list_head *list;
struct dm_zone *zone;
+ unsigned int dev_idx = 0;
+again:
if (flags & DMZ_ALLOC_CACHE)
list = &zmd->unmap_cache_list;
else if (flags & DMZ_ALLOC_RND)
- list = &zmd->unmap_rnd_list;
+ list = &zmd->dev[dev_idx].unmap_rnd_list;
else
- list = &zmd->unmap_seq_list;
+ list = &zmd->dev[dev_idx].unmap_seq_list;
-again:
if (list_empty(list)) {
/*
* No free zone: return NULL if this is for not reclaim.
*/
if (!(flags & DMZ_ALLOC_RECLAIM))
return NULL;
+ if (dev_idx < zmd->nr_devs) {
+ dev_idx++;
+ goto again;
+ }
+
/*
* Fallback to the reserved sequential zones
*/
@@ -2193,9 +2215,9 @@ struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags)
if (dmz_is_cache(zone))
atomic_dec(&zmd->unmap_nr_cache);
else if (dmz_is_rnd(zone))
- atomic_dec(&zmd->unmap_nr_rnd);
+ atomic_dec(&zone->dev->unmap_nr_rnd);
else
- atomic_dec(&zmd->unmap_nr_seq);
+ atomic_dec(&zone->dev->unmap_nr_seq);
if (dmz_is_offline(zone)) {
dmz_zmd_warn(zmd, "Zone %u is offline", zone->id);
@@ -2225,14 +2247,14 @@ void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone)
list_add_tail(&zone->link, &zmd->unmap_cache_list);
atomic_inc(&zmd->unmap_nr_cache);
} else if (dmz_is_rnd(zone)) {
- list_add_tail(&zone->link, &zmd->unmap_rnd_list);
- atomic_inc(&zmd->unmap_nr_rnd);
+ list_add_tail(&zone->link, &zone->dev->unmap_rnd_list);
+ atomic_inc(&zone->dev->unmap_nr_rnd);
} else if (dmz_is_reserved(zone)) {
list_add_tail(&zone->link, &zmd->reserved_seq_zones_list);
atomic_inc(&zmd->nr_reserved_seq_zones);
} else {
- list_add_tail(&zone->link, &zmd->unmap_seq_list);
- atomic_inc(&zmd->unmap_nr_seq);
+ list_add_tail(&zone->link, &zone->dev->unmap_seq_list);
+ atomic_inc(&zone->dev->unmap_nr_seq);
}
wake_up_all(&zmd->free_wq);
@@ -2252,9 +2274,9 @@ void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *dzone,
if (dmz_is_cache(dzone))
list_add_tail(&dzone->link, &zmd->map_cache_list);
else if (dmz_is_rnd(dzone))
- list_add_tail(&dzone->link, &zmd->map_rnd_list);
+ list_add_tail(&dzone->link, &dzone->dev->map_rnd_list);
else
- list_add_tail(&dzone->link, &zmd->map_seq_list);
+ list_add_tail(&dzone->link, &dzone->dev->map_seq_list);
}
/*
@@ -2822,18 +2844,11 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev,
INIT_LIST_HEAD(&zmd->mblk_dirty_list);
mutex_init(&zmd->map_lock);
- atomic_set(&zmd->unmap_nr_rnd, 0);
- INIT_LIST_HEAD(&zmd->unmap_rnd_list);
- INIT_LIST_HEAD(&zmd->map_rnd_list);
atomic_set(&zmd->unmap_nr_cache, 0);
INIT_LIST_HEAD(&zmd->unmap_cache_list);
INIT_LIST_HEAD(&zmd->map_cache_list);
- atomic_set(&zmd->unmap_nr_seq, 0);
- INIT_LIST_HEAD(&zmd->unmap_seq_list);
- INIT_LIST_HEAD(&zmd->map_seq_list);
-
atomic_set(&zmd->nr_reserved_seq_zones, 0);
INIT_LIST_HEAD(&zmd->reserved_seq_zones_list);
@@ -2902,10 +2917,14 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev,
zmd->nr_data_zones, zmd->nr_chunks);
dmz_zmd_debug(zmd, " %u cache zones (%u unmapped)",
zmd->nr_cache, atomic_read(&zmd->unmap_nr_cache));
- dmz_zmd_debug(zmd, " %u random zones (%u unmapped)",
- zmd->nr_rnd, atomic_read(&zmd->unmap_nr_rnd));
- dmz_zmd_debug(zmd, " %u sequential zones (%u unmapped)",
- zmd->nr_seq, atomic_read(&zmd->unmap_nr_seq));
+ for (i = 0; i < zmd->nr_devs; i++) {
+ dmz_zmd_debug(zmd, " %u random zones (%u unmapped)",
+ dmz_nr_rnd_zones(zmd, i),
+ dmz_nr_unmap_rnd_zones(zmd, i));
+ dmz_zmd_debug(zmd, " %u sequential zones (%u unmapped)",
+ dmz_nr_seq_zones(zmd, i),
+ dmz_nr_unmap_seq_zones(zmd, i));
+ }
dmz_zmd_debug(zmd, " %u reserved sequential data zones",
zmd->nr_reserved_seq);
dmz_zmd_debug(zmd, "Format:");
diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c
index 09843645248a..18edf1b9bf52 100644
--- a/drivers/md/dm-zoned-reclaim.c
+++ b/drivers/md/dm-zoned-reclaim.c
@@ -447,15 +447,14 @@ static unsigned int dmz_reclaim_percentage(struct dmz_reclaim *zrc)
{
struct dmz_metadata *zmd = zrc->metadata;
unsigned int nr_cache = dmz_nr_cache_zones(zmd);
- unsigned int nr_rnd = dmz_nr_rnd_zones(zmd);
unsigned int nr_unmap, nr_zones;
if (nr_cache) {
nr_zones = nr_cache;
nr_unmap = dmz_nr_unmap_cache_zones(zmd);
} else {
- nr_zones = nr_rnd;
- nr_unmap = dmz_nr_unmap_rnd_zones(zmd);
+ nr_zones = dmz_nr_rnd_zones(zmd, zrc->dev_idx);
+ nr_unmap = dmz_nr_unmap_rnd_zones(zmd, zrc->dev_idx);
}
return nr_unmap * 100 / nr_zones;
}
@@ -467,7 +466,7 @@ static bool dmz_should_reclaim(struct dmz_reclaim *zrc, unsigned int p_unmap)
{
unsigned int nr_reclaim;
- nr_reclaim = dmz_nr_rnd_zones(zrc->metadata);
+ nr_reclaim = dmz_nr_rnd_zones(zrc->metadata, zrc->dev_idx);
if (dmz_nr_cache_zones(zrc->metadata)) {
/*
@@ -528,8 +527,8 @@ static void dmz_reclaim_work(struct work_struct *work)
zrc->kc_throttle.throttle = min(75U, 100U - p_unmap / 2);
}
- nr_unmap_rnd = dmz_nr_unmap_rnd_zones(zmd);
- nr_rnd = dmz_nr_rnd_zones(zmd);
+ nr_unmap_rnd = dmz_nr_unmap_rnd_zones(zmd, zrc->dev_idx);
+ nr_rnd = dmz_nr_rnd_zones(zmd, zrc->dev_idx);
DMDEBUG("(%s/%u): Reclaim (%u): %s, %u%% free zones (%u/%u cache %u/%u random)",
dmz_metadata_label(zmd), zrc->dev_idx,
@@ -537,8 +536,8 @@ static void dmz_reclaim_work(struct work_struct *work)
(dmz_target_idle(zrc) ? "Idle" : "Busy"),
p_unmap, dmz_nr_unmap_cache_zones(zmd),
dmz_nr_cache_zones(zmd),
- dmz_nr_unmap_rnd_zones(zmd),
- dmz_nr_rnd_zones(zmd));
+ dmz_nr_unmap_rnd_zones(zmd, zrc->dev_idx),
+ dmz_nr_rnd_zones(zmd, zrc->dev_idx));
ret = dmz_do_reclaim(zrc);
if (ret && ret != -EINTR) {
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index 97d63d8e6c19..aa3d26d16441 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -1075,17 +1075,30 @@ static void dmz_status(struct dm_target *ti, status_type_t type,
ssize_t sz = 0;
char buf[BDEVNAME_SIZE];
struct dmz_dev *dev;
+ int i;
switch (type) {
case STATUSTYPE_INFO:
- DMEMIT("%u zones %u/%u cache %u/%u random %u/%u sequential",
+ DMEMIT("%u zones %u/%u cache",
dmz_nr_zones(dmz->metadata),
dmz_nr_unmap_cache_zones(dmz->metadata),
- dmz_nr_cache_zones(dmz->metadata),
- dmz_nr_unmap_rnd_zones(dmz->metadata),
- dmz_nr_rnd_zones(dmz->metadata),
- dmz_nr_unmap_seq_zones(dmz->metadata),
- dmz_nr_seq_zones(dmz->metadata));
+ dmz_nr_cache_zones(dmz->metadata));
+ for (i = 0; i < DMZ_MAX_DEVS; i++) {
+ if (!dmz->ddev[i])
+ continue;
+ /*
+ * For a multi-device setup the first device
+ * contains only cache zones.
+ */
+ if ((i == 0) &&
+ (dmz_nr_cache_zones(dmz->metadata) > 0))
+ continue;
+ DMEMIT(" %u/%u random %u/%u sequential",
+ dmz_nr_unmap_rnd_zones(dmz->metadata, i),
+ dmz_nr_rnd_zones(dmz->metadata, i),
+ dmz_nr_unmap_seq_zones(dmz->metadata, i),
+ dmz_nr_seq_zones(dmz->metadata, i));
+ }
break;
case STATUSTYPE_TABLE:
dev = &dmz->dev[0];
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
index 0cc3459f78ce..f2a760f62db5 100644
--- a/drivers/md/dm-zoned.h
+++ b/drivers/md/dm-zoned.h
@@ -67,6 +67,16 @@ struct dmz_dev {
unsigned int flags;
sector_t zone_nr_sectors;
+
+ unsigned int nr_rnd;
+ atomic_t unmap_nr_rnd;
+ struct list_head unmap_rnd_list;
+ struct list_head map_rnd_list;
+
+ unsigned int nr_seq;
+ atomic_t unmap_nr_seq;
+ struct list_head unmap_seq_list;
+ struct list_head map_seq_list;
};
#define dmz_bio_chunk(zmd, bio) ((bio)->bi_iter.bi_sector >> \
@@ -213,10 +223,10 @@ 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);
-unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd);
+unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx);
unsigned int dmz_zone_nr_blocks(struct dmz_metadata *zmd);
unsigned int dmz_zone_nr_blocks_shift(struct dmz_metadata *zmd);
unsigned int dmz_zone_nr_sectors(struct dmz_metadata *zmd);
--
2.16.4
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