diff options
author | Javier González <jg@lightnvm.io> | 2017-06-26 11:57:19 +0200 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2017-06-26 16:27:39 -0600 |
commit | 0880a9aa2d91ff5131ecd0902a758afe760b9c1c (patch) | |
tree | 4a6859cc239610cf63a4a4875a6048e5b6a6b680 /drivers | |
parent | fd1b0158f5f5937d73d5c61e229350c6b905d0da (diff) | |
download | linux-0880a9aa2d91ff5131ecd0902a758afe760b9c1c.tar.bz2 |
lightnvm: pblk: delete redundant buffer pointer
After refactoring the metadata path, the backpointer controlling
synced I/Os in a line becomes unnecessary; metadata is scheduled
on the write thread, thus we know when the end of the line is reached
and act on it directly.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/lightnvm/pblk-core.c | 18 | ||||
-rw-r--r-- | drivers/lightnvm/pblk-init.c | 1 | ||||
-rw-r--r-- | drivers/lightnvm/pblk-map.c | 2 | ||||
-rw-r--r-- | drivers/lightnvm/pblk-recovery.c | 2 | ||||
-rw-r--r-- | drivers/lightnvm/pblk-sysfs.c | 10 | ||||
-rw-r--r-- | drivers/lightnvm/pblk-write.c | 13 | ||||
-rw-r--r-- | drivers/lightnvm/pblk.h | 6 |
7 files changed, 11 insertions, 41 deletions
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 6e4b06f841e7..beae1618483f 100644 --- a/drivers/lightnvm/pblk-core.c +++ b/drivers/lightnvm/pblk-core.c @@ -65,8 +65,8 @@ static void pblk_end_io_erase(struct nvm_rq *rqd) mempool_free(rqd, pblk->g_rq_pool); } -static void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, - u64 paddr) +void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, + u64 paddr) { struct pblk_line_mgmt *l_mg = &pblk->l_mg; struct list_head *move_list = NULL; @@ -129,18 +129,6 @@ void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa) __pblk_map_invalidate(pblk, line, paddr); } -void pblk_map_pad_invalidate(struct pblk *pblk, struct pblk_line *line, - u64 paddr) -{ - __pblk_map_invalidate(pblk, line, paddr); - - pblk_rb_sync_init(&pblk->rwb, NULL); - line->left_ssecs--; - if (!line->left_ssecs) - pblk_line_run_ws(pblk, line, NULL, pblk_line_close_ws); - pblk_rb_sync_end(&pblk->rwb, NULL); -} - static void pblk_invalidate_range(struct pblk *pblk, sector_t slba, unsigned int nr_secs) { @@ -1057,7 +1045,7 @@ retry_smeta: line->sec_in_line -= lm->emeta_sec[0]; line->emeta_ssec = off; line->nr_valid_lbas = 0; - line->left_ssecs = line->left_msecs = line->sec_in_line; + line->left_msecs = line->sec_in_line; *line->vsc = cpu_to_le32(line->sec_in_line); if (lm->sec_per_line - line->sec_in_line != diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 54e03c3e7962..cd10f2d74cf9 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -890,7 +890,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, atomic_long_set(&pblk->req_writes, 0); atomic_long_set(&pblk->sub_writes, 0); atomic_long_set(&pblk->sync_writes, 0); - atomic_long_set(&pblk->compl_writes, 0); atomic_long_set(&pblk->inflight_reads, 0); atomic_long_set(&pblk->cache_reads, 0); atomic_long_set(&pblk->sync_reads, 0); diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c index 08580a649499..9942d9bc7b3a 100644 --- a/drivers/lightnvm/pblk-map.c +++ b/drivers/lightnvm/pblk-map.c @@ -56,7 +56,7 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry, u64 addr_empty = cpu_to_le64(ADDR_EMPTY); lba_list[paddr] = meta_list[i].lba = addr_empty; - pblk_map_pad_invalidate(pblk, line, paddr); + __pblk_map_invalidate(pblk, line, paddr); } } diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c index ba02d0bc3e45..7b0ace2f4957 100644 --- a/drivers/lightnvm/pblk-recovery.c +++ b/drivers/lightnvm/pblk-recovery.c @@ -553,7 +553,6 @@ next_rq: if (ret) pr_err("pblk: OOB read failed (err:%d)\n", ret); - line->left_ssecs = line->left_msecs; left_ppas = 0; } @@ -659,7 +658,6 @@ next_rq: /* Roll back failed sectors */ line->cur_sec -= nr_error_bits; line->left_msecs += nr_error_bits; - line->left_ssecs = line->left_msecs; bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); left_ppas = 0; diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c index 3d9a77646a3d..e1e92c9498a9 100644 --- a/drivers/lightnvm/pblk-sysfs.c +++ b/drivers/lightnvm/pblk-sysfs.c @@ -154,7 +154,7 @@ static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page) int d_line_cnt = 0, l_line_cnt = 0; int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0; int bad = 0, cor = 0; - int msecs = 0, ssecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0; + int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0; int map_weight = 0, meta_weight = 0; spin_lock(&l_mg->free_lock); @@ -227,7 +227,6 @@ static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page) if (l_mg->data_line) { cur_sec = l_mg->data_line->cur_sec; msecs = l_mg->data_line->left_msecs; - ssecs = l_mg->data_line->left_ssecs; vsc = le32_to_cpu(*l_mg->data_line->vsc); sec_in_line = l_mg->data_line->sec_in_line; meta_weight = bitmap_weight(&l_mg->meta_bitmap, @@ -259,8 +258,8 @@ static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page) atomic_read(&pblk->gc.inflight_gc)); sz += snprintf(page + sz, PAGE_SIZE - sz, - "data (%d) cur:%d, left:%d/%d, vsc:%d, s:%d, map:%d/%d (%d)\n", - cur_data, cur_sec, msecs, ssecs, vsc, sec_in_line, + "data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n", + cur_data, cur_sec, msecs, vsc, sec_in_line, map_weight, lm->sec_per_line, meta_weight); return sz; @@ -303,7 +302,7 @@ static ssize_t pblk_sysfs_get_sec_per_write(struct pblk *pblk, char *page) static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page) { return snprintf(page, PAGE_SIZE, - "%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n", + "%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n", atomic_long_read(&pblk->inflight_writes), atomic_long_read(&pblk->inflight_reads), atomic_long_read(&pblk->req_writes), @@ -312,7 +311,6 @@ static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page) atomic_long_read(&pblk->padded_wb), atomic_long_read(&pblk->sub_writes), atomic_long_read(&pblk->sync_writes), - atomic_long_read(&pblk->compl_writes), atomic_long_read(&pblk->recov_writes), atomic_long_read(&pblk->recov_gc_writes), atomic_long_read(&pblk->recov_gc_reads), diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c index 1739c970692e..a29a34786ac5 100644 --- a/drivers/lightnvm/pblk-write.c +++ b/drivers/lightnvm/pblk-write.c @@ -17,16 +17,6 @@ #include "pblk.h" -static void pblk_sync_line(struct pblk *pblk, struct pblk_line *line) -{ -#ifdef CONFIG_NVM_DEBUG - atomic_long_inc(&pblk->sync_writes); -#endif - - /* Counter protected by rb sync lock */ - line->left_ssecs--; -} - static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, struct pblk_c_ctx *c_ctx) { @@ -44,14 +34,13 @@ static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, p = rqd->ppa_list[i]; line = &pblk->lines[pblk_dev_ppa_to_line(p)]; - pblk_sync_line(pblk, line); while ((original_bio = bio_list_pop(&w_ctx->bios))) bio_endio(original_bio); } #ifdef CONFIG_NVM_DEBUG - atomic_long_add(c_ctx->nr_valid, &pblk->compl_writes); + atomic_long_add(c_ctx->nr_valid, &pblk->sync_writes); #endif ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 07ae3c07d563..50f30434718f 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -395,7 +395,6 @@ struct pblk_line { atomic_t left_seblks; /* Blocks left for sync erasing */ int left_msecs; /* Sectors left for mapping */ - int left_ssecs; /* Sectors left to sync */ unsigned int cur_sec; /* Sector map pointer */ unsigned int nr_valid_lbas; /* Number of valid lbas in line */ @@ -555,7 +554,6 @@ struct pblk { atomic_long_t req_writes; /* Sectors stored on write buffer */ atomic_long_t sub_writes; /* Sectors submitted from buffer */ atomic_long_t sync_writes; /* Sectors synced to media */ - atomic_long_t compl_writes; /* Sectors completed in write bio */ atomic_long_t inflight_reads; /* Inflight sector read requests */ atomic_long_t cache_reads; /* Read requests that hit the cache */ atomic_long_t sync_reads; /* Completed sector read requests */ @@ -706,11 +704,11 @@ void pblk_end_bio_sync(struct bio *bio); void pblk_end_io_sync(struct nvm_rq *rqd); int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, int nr_pages); -void pblk_map_pad_invalidate(struct pblk *pblk, struct pblk_line *line, - u64 paddr); void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, int nr_pages); void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); +void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, + u64 paddr); void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); |