diff options
| author | Igor Konopko <igor.j.konopko@intel.com> | 2019-05-04 20:37:48 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-05-06 18:19:16 +0200 |
| commit | 847a3a2788c57454ab715e07777431cc5fc76f48 (patch) | |
| tree | 548099a55f3ed3b21925851f1ed91dbb40deb69d /drivers/lightnvm/pblk-init.c | |
| parent | lightnvm: pblk: rollback on error during gc read (diff) | |
| download | linux-847a3a2788c57454ab715e07777431cc5fc76f48.tar.xz linux-847a3a2788c57454ab715e07777431cc5fc76f48.zip | |
lightnvm: pblk: reduce L2P memory footprint
Currently L2P map size is calculated based on the total number of
available sectors, which is redundant, since it contains mapping for
overprovisioning as well (11% by default).
Change this size to the real capacity and thus reduce the memory
footprint significantly - with default op value it is approx.
110MB of DRAM less for every 1TB of media.
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Reviewed-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk-init.c')
| -rw-r--r-- | drivers/lightnvm/pblk-init.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 8b643d0bffae..81e8ed4d31ea 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -105,7 +105,7 @@ static size_t pblk_trans_map_size(struct pblk *pblk) if (pblk->addrf_len < 32) entry_size = 4; - return entry_size * pblk->rl.nr_secs; + return entry_size * pblk->capacity; } #ifdef CONFIG_NVM_PBLK_DEBUG @@ -170,7 +170,7 @@ static int pblk_l2p_init(struct pblk *pblk, bool factory_init) pblk_ppa_set_empty(&ppa); - for (i = 0; i < pblk->rl.nr_secs; i++) + for (i = 0; i < pblk->capacity; i++) pblk_trans_map_set(pblk, i, ppa); ret = pblk_l2p_recover(pblk, factory_init); @@ -701,7 +701,6 @@ static int pblk_set_provision(struct pblk *pblk, int nr_free_chks) * on user capacity consider only provisioned blocks */ pblk->rl.total_blocks = nr_free_chks; - pblk->rl.nr_secs = nr_free_chks * geo->clba; /* Consider sectors used for metadata */ sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; @@ -1284,7 +1283,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, pblk_info(pblk, "luns:%u, lines:%d, secs:%llu, buf entries:%u\n", geo->all_luns, pblk->l_mg.nr_lines, - (unsigned long long)pblk->rl.nr_secs, + (unsigned long long)pblk->capacity, pblk->rwb.nr_entries); wake_up_process(pblk->writer_ts); |