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dm zoned: allocate zone by device index

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When allocating a zone, pass in an indicator on which device the zone
should be allocated; this increases performance for a multi-device
setup because reclaim will now allocate zones on the device for which
reclaim is running.

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>
This commit is contained in:
Hannes Reinecke 2020-06-02 13:09:53 +02:00 committed by Mike Snitzer
parent 4dba12881f
commit 22c1ef66c4
3 changed files with 15 additions and 8 deletions
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17
drivers/md/dm-zoned-metadata.c
View File

@ -2050,7 +2050,7 @@ again:
goto out;
/* Allocate a random zone */
dzone = dmz_alloc_zone(zmd, alloc_flags);
dzone = dmz_alloc_zone(zmd, 0, alloc_flags);
if (!dzone) {
if (dmz_dev_is_dying(zmd)) {
dzone = ERR_PTR(-EIO);
@ -2156,7 +2156,7 @@ again:
goto out;
/* Allocate a random zone */
bzone = dmz_alloc_zone(zmd, alloc_flags);
bzone = dmz_alloc_zone(zmd, 0, alloc_flags);
if (!bzone) {
if (dmz_dev_is_dying(zmd)) {
bzone = ERR_PTR(-EIO);
@ -2187,11 +2187,12 @@ out:
* Get an unmapped (free) zone.
* This must be called with the mapping lock held.
*/
struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags)
struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned int dev_idx,
unsigned long flags)
{
struct list_head *list;
struct dm_zone *zone;
unsigned int dev_idx = 0;
int i = 0;
again:
if (flags & DMZ_ALLOC_CACHE)
@ -2207,8 +2208,12 @@ again:
*/
if (!(flags & DMZ_ALLOC_RECLAIM))
return NULL;
if (dev_idx < zmd->nr_devs) {
dev_idx++;
/*
* Try to allocate from other devices
*/
if (i < zmd->nr_devs) {
dev_idx = (dev_idx + 1) % zmd->nr_devs;
i++;
goto again;
}

3
drivers/md/dm-zoned-reclaim.c
View File

@ -288,7 +288,8 @@ static int dmz_reclaim_rnd_data(struct dmz_reclaim *zrc, struct dm_zone *dzone)
/* Get a free random or sequential zone */
dmz_lock_map(zmd);
again:
szone = dmz_alloc_zone(zmd, alloc_flags | DMZ_ALLOC_RECLAIM);
szone = dmz_alloc_zone(zmd, zrc->dev_idx,
alloc_flags | DMZ_ALLOC_RECLAIM);
if (!szone && alloc_flags == DMZ_ALLOC_SEQ && dmz_nr_cache_zones(zmd)) {
alloc_flags = DMZ_ALLOC_RND;
goto again;

3
drivers/md/dm-zoned.h
View File

@ -214,7 +214,8 @@ bool dmz_dev_is_dying(struct dmz_metadata *zmd);
#define DMZ_ALLOC_SEQ 0x04
#define DMZ_ALLOC_RECLAIM 0x10
struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags);
struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd,
unsigned int dev_idx, unsigned long flags);
void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone,