From fae7fae4077c24dc2be720b9f21f53adea98d7dd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= Date: Fri, 5 Jan 2018 14:16:03 +0100 Subject: lightnvm: make geometry structures 2.0 ready MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Prepare for the 2.0 revision by adapting the geometry structures to coexist with the 1.2 revision. Signed-off-by: Matias Bjørling Reviewed-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 62 +++++++++++++++++++++++--------------------- 1 file changed, 32 insertions(+), 30 deletions(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 695826a06b5d..d13bb51f0e2f 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -169,8 +169,8 @@ static int pblk_set_ppaf(struct pblk *pblk) } ppaf.ch_len = power_len; - power_len = get_count_order(geo->luns_per_chnl); - if (1 << power_len != geo->luns_per_chnl) { + power_len = get_count_order(geo->nr_luns); + if (1 << power_len != geo->nr_luns) { pr_err("pblk: supports only power-of-two LUN config.\n"); return -EINVAL; } @@ -254,7 +254,7 @@ static int pblk_core_init(struct pblk *pblk) struct nvm_geo *geo = &dev->geo; pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * - geo->nr_planes * geo->nr_luns; + geo->nr_planes * geo->all_luns; if (pblk_init_global_caches(pblk)) return -ENOMEM; @@ -270,21 +270,22 @@ static int pblk_core_init(struct pblk *pblk) if (!pblk->gen_ws_pool) goto free_page_bio_pool; - pblk->rec_pool = mempool_create_slab_pool(geo->nr_luns, pblk_rec_cache); + pblk->rec_pool = mempool_create_slab_pool(geo->all_luns, + pblk_rec_cache); if (!pblk->rec_pool) goto free_gen_ws_pool; - pblk->r_rq_pool = mempool_create_slab_pool(geo->nr_luns, + pblk->r_rq_pool = mempool_create_slab_pool(geo->all_luns, pblk_g_rq_cache); if (!pblk->r_rq_pool) goto free_rec_pool; - pblk->e_rq_pool = mempool_create_slab_pool(geo->nr_luns, + pblk->e_rq_pool = mempool_create_slab_pool(geo->all_luns, pblk_g_rq_cache); if (!pblk->e_rq_pool) goto free_r_rq_pool; - pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns, + pblk->w_rq_pool = mempool_create_slab_pool(geo->all_luns, pblk_w_rq_cache); if (!pblk->w_rq_pool) goto free_e_rq_pool; @@ -409,7 +410,7 @@ static int pblk_bb_discovery(struct nvm_tgt_dev *dev, struct pblk_lun *rlun) u8 *blks; int nr_blks, ret; - nr_blks = geo->blks_per_lun * geo->plane_mode; + nr_blks = geo->nr_chks * geo->plane_mode; blks = kmalloc(nr_blks, GFP_KERNEL); if (!blks) return -ENOMEM; @@ -482,20 +483,21 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) int i, ret; /* TODO: Implement unbalanced LUN support */ - if (geo->luns_per_chnl < 0) { + if (geo->nr_luns < 0) { pr_err("pblk: unbalanced LUN config.\n"); return -EINVAL; } - pblk->luns = kcalloc(geo->nr_luns, sizeof(struct pblk_lun), GFP_KERNEL); + pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), + GFP_KERNEL); if (!pblk->luns) return -ENOMEM; - for (i = 0; i < geo->nr_luns; i++) { + for (i = 0; i < geo->all_luns; i++) { /* Stripe across channels */ int ch = i % geo->nr_chnls; int lun_raw = i / geo->nr_chnls; - int lunid = lun_raw + ch * geo->luns_per_chnl; + int lunid = lun_raw + ch * geo->nr_luns; rlun = &pblk->luns[i]; rlun->bppa = luns[lunid]; @@ -590,8 +592,8 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) * on user capacity consider only provisioned blocks */ pblk->rl.total_blocks = nr_free_blks; - pblk->rl.nr_secs = nr_free_blks * geo->sec_per_blk; - pblk->capacity = provisioned * geo->sec_per_blk; + pblk->rl.nr_secs = nr_free_blks * geo->sec_per_chk; + pblk->capacity = provisioned * geo->sec_per_chk; atomic_set(&pblk->rl.free_blocks, nr_free_blks); } @@ -683,7 +685,7 @@ static int pblk_lines_init(struct pblk *pblk) int i, ret; pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); - max_write_ppas = pblk->min_write_pgs * geo->nr_luns; + max_write_ppas = pblk->min_write_pgs * geo->all_luns; pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ? max_write_ppas : nvm_max_phys_sects(dev); pblk_set_sec_per_write(pblk, pblk->min_write_pgs); @@ -693,26 +695,26 @@ static int pblk_lines_init(struct pblk *pblk) return -EINVAL; } - div_u64_rem(geo->sec_per_blk, pblk->min_write_pgs, &mod); + div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod); if (mod) { pr_err("pblk: bad configuration of sectors/pages\n"); return -EINVAL; } - l_mg->nr_lines = geo->blks_per_lun; + l_mg->nr_lines = geo->nr_chks; l_mg->log_line = l_mg->data_line = NULL; l_mg->l_seq_nr = l_mg->d_seq_nr = 0; l_mg->nr_free_lines = 0; bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); - lm->sec_per_line = geo->sec_per_blk * geo->nr_luns; - lm->blk_per_line = geo->nr_luns; - lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); + lm->sec_per_line = geo->sec_per_chk * geo->all_luns; + lm->blk_per_line = geo->all_luns; + lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); - lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); + lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); lm->mid_thrs = lm->sec_per_line / 2; lm->high_thrs = lm->sec_per_line / 4; - lm->meta_distance = (geo->nr_luns / 2) * pblk->min_write_pgs; + lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; /* Calculate necessary pages for smeta. See comment over struct * line_smeta definition @@ -742,12 +744,12 @@ add_emeta_page: goto add_emeta_page; } - lm->emeta_bb = geo->nr_luns > i ? geo->nr_luns - i : 0; + lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; lm->min_blk_line = 1; - if (geo->nr_luns > 1) + if (geo->all_luns > 1) lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + - lm->emeta_sec[0], geo->sec_per_blk); + lm->emeta_sec[0], geo->sec_per_chk); if (lm->min_blk_line > lm->blk_per_line) { pr_err("pblk: config. not supported. Min. LUN in line:%d\n", @@ -772,7 +774,7 @@ add_emeta_page: goto fail_free_bb_template; } - bb_distance = (geo->nr_luns) * geo->sec_per_pl; + bb_distance = (geo->all_luns) * geo->sec_per_pl; for (i = 0; i < lm->sec_per_line; i += bb_distance) bitmap_set(l_mg->bb_template, i, geo->sec_per_pl); @@ -844,7 +846,7 @@ add_emeta_page: pblk_set_provision(pblk, nr_free_blks); /* Cleanup per-LUN bad block lists - managed within lines on run-time */ - for (i = 0; i < geo->nr_luns; i++) + for (i = 0; i < geo->all_luns; i++) kfree(pblk->luns[i].bb_list); return 0; @@ -858,7 +860,7 @@ fail_free_bb_template: fail_free_meta: pblk_line_meta_free(pblk); fail: - for (i = 0; i < geo->nr_luns; i++) + for (i = 0; i < geo->all_luns; i++) kfree(pblk->luns[i].bb_list); return ret; @@ -1041,13 +1043,13 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, blk_queue_write_cache(tqueue, true, false); - tqueue->limits.discard_granularity = geo->pgs_per_blk * geo->pfpg_size; + tqueue->limits.discard_granularity = geo->sec_per_chk * geo->sec_size; tqueue->limits.discard_alignment = 0; blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue); pr_info("pblk init: luns:%u, lines:%d, secs:%llu, buf entries:%u\n", - geo->nr_luns, pblk->l_mg.nr_lines, + geo->all_luns, pblk->l_mg.nr_lines, (unsigned long long)pblk->rl.nr_secs, pblk->rwb.nr_entries); -- cgit v1.2.3 From a7689938ef4c8678ff78c44d11e4b0b897244714 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 5 Jan 2018 14:16:13 +0100 Subject: lightnvm: pblk: use exact free block counter in RL MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Until now, pblk's rate-limiter has used a heuristic to reserve space for GC I/O given that the over-provision area was fixed. In preparation for allowing to define the over-provision area on target creation, define a dedicated free_block counter in the rate-limiter to track the number of blocks being used for user data. Signed-off-by: Javier González Signed-off-by: Hans Holmberg Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index d13bb51f0e2f..c8a718249e26 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -579,22 +579,34 @@ static unsigned int calc_emeta_len(struct pblk *pblk) static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) { struct nvm_tgt_dev *dev = pblk->dev; + struct pblk_line_mgmt *l_mg = &pblk->l_mg; + struct pblk_line_meta *lm = &pblk->lm; struct nvm_geo *geo = &dev->geo; sector_t provisioned; + int sec_meta, blk_meta; - pblk->over_pct = 20; + pblk->op = 20; provisioned = nr_free_blks; - provisioned *= (100 - pblk->over_pct); + provisioned *= (100 - pblk->op); sector_div(provisioned, 100); + pblk->op_blks = nr_free_blks - provisioned; + /* Internally pblk manages all free blocks, but all calculations based * on user capacity consider only provisioned blocks */ pblk->rl.total_blocks = nr_free_blks; pblk->rl.nr_secs = nr_free_blks * geo->sec_per_chk; - pblk->capacity = provisioned * geo->sec_per_chk; + + /* Consider sectors used for metadata */ + sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; + blk_meta = DIV_ROUND_UP(sec_meta, geo->sec_per_chk); + + pblk->capacity = (provisioned - blk_meta) * geo->sec_per_chk; + atomic_set(&pblk->rl.free_blocks, nr_free_blks); + atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); } static int pblk_lines_alloc_metadata(struct pblk *pblk) -- cgit v1.2.3 From e53927393b9987b7c986b6364c27111077f0ea3e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 5 Jan 2018 14:16:14 +0100 Subject: lightnvm: set target over-provision on create ioctl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Allow to set the over-provision percentage on target creation. In case that the value is not provided, fall back to the default value set by the target. In pblk, set the default OP to 11% of the total size of the device Signed-off-by: Javier González Signed-off-by: Hans Holmberg Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index c8a718249e26..533f6908e238 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -585,7 +585,10 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) sector_t provisioned; int sec_meta, blk_meta; - pblk->op = 20; + if (geo->op == NVM_TARGET_DEFAULT_OP) + pblk->op = PBLK_DEFAULT_OP; + else + pblk->op = geo->op; provisioned = nr_free_blks; provisioned *= (100 - pblk->op); -- cgit v1.2.3 From cc4f5ba1fb6ebe977fb44293abebb79af77556f0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 5 Jan 2018 14:16:17 +0100 Subject: lightnvm: pblk: ensure kthread alloc. before kicking it MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When creating the write thread, ensure that the kthread has been created before initializing the timer responsible from kicking it. Otherwise, if the kthread creation fails or gets killed from used space, we risk kicking an empty thread structure. Also, since the kthread creation can be interrupted form user space, adapt the error path to not report an error when this happens, since it is intentional that the instance creation is aborted. Signed-off-by: Javier González Updated source to reflect the new timer_setup API. Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 533f6908e238..7e11926830db 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -883,15 +883,19 @@ fail: static int pblk_writer_init(struct pblk *pblk) { - timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); - mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); - pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); if (IS_ERR(pblk->writer_ts)) { - pr_err("pblk: could not allocate writer kthread\n"); - return PTR_ERR(pblk->writer_ts); + int err = PTR_ERR(pblk->writer_ts); + + if (err != -EINTR) + pr_err("pblk: could not allocate writer kthread (%d)\n", + err); + return err; } + timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); + mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); + return 0; } @@ -1042,7 +1046,8 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, ret = pblk_writer_init(pblk); if (ret) { - pr_err("pblk: could not initialize write thread\n"); + if (ret != -EINTR) + pr_err("pblk: could not initialize write thread\n"); goto fail_free_lines; } -- cgit v1.2.3 From c6847e4e359f01745bad5aea0fa20a0c5edfdc51 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 5 Jan 2018 14:16:18 +0100 Subject: lightnvm: pblk: free write buffer on init failure MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Refactor the way we free the write buffer to ensure that all entries get freed in case of an error on the init sequence. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 7e11926830db..8c40bc358b71 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -355,6 +355,8 @@ static void pblk_core_free(struct pblk *pblk) mempool_destroy(pblk->e_rq_pool); mempool_destroy(pblk->w_rq_pool); + pblk_rwb_free(pblk); + pblk_free_global_caches(pblk); } @@ -931,7 +933,6 @@ static void pblk_tear_down(struct pblk *pblk) pblk_pipeline_stop(pblk); pblk_writer_stop(pblk); pblk_rb_sync_l2p(&pblk->rwb); - pblk_rwb_free(pblk); pblk_rl_free(&pblk->rl); pr_debug("pblk: consistent tear down\n"); -- cgit v1.2.3 From 30d82a8631428709c436ea5568bf68fe7cfaf8e8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 5 Jan 2018 14:16:19 +0100 Subject: lightnvm: pblk: print instance name on instance info MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add the instance name to the information printed out on target creation. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 8c40bc358b71..93d671ca518e 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -1069,7 +1069,8 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue); - pr_info("pblk init: luns:%u, lines:%d, secs:%llu, buf entries:%u\n", + pr_info("pblk(%s): luns:%u, lines:%d, secs:%llu, buf entries:%u\n", + tdisk->disk_name, geo->all_luns, pblk->l_mg.nr_lines, (unsigned long long)pblk->rl.nr_secs, pblk->rwb.nr_entries); -- cgit v1.2.3