From 8154d296d904a6627d69878ab217ef6928335c2d Mon Sep 17 00:00:00 2001 From: Hans Holmberg Date: Fri, 5 Jan 2018 14:16:09 +0100 Subject: [PATCH] lightnvm: pblk: rename sync_point to flush_point MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Sync point is a really confusing name for keeping track of the last entry that needs to be flushed so change the name to to flush_point instead. Signed-off-by: Hans Holmberg Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-rb.c | 61 ++++++++++++++++++----------------- drivers/lightnvm/pblk-write.c | 2 +- drivers/lightnvm/pblk.h | 6 ++-- 3 files changed, 35 insertions(+), 34 deletions(-) diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c index 62db40845bfd..941842e321ea 100644 --- a/drivers/lightnvm/pblk-rb.c +++ b/drivers/lightnvm/pblk-rb.c @@ -54,7 +54,7 @@ int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base, rb->seg_size = (1 << power_seg_sz); rb->nr_entries = (1 << power_size); rb->mem = rb->subm = rb->sync = rb->l2p_update = 0; - rb->sync_point = EMPTY_ENTRY; + rb->flush_point = EMPTY_ENTRY; spin_lock_init(&rb->w_lock); spin_lock_init(&rb->s_lock); @@ -112,7 +112,7 @@ int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base, up_write(&pblk_rb_lock); #ifdef CONFIG_NVM_DEBUG - atomic_set(&rb->inflight_sync_point, 0); + atomic_set(&rb->inflight_flush_point, 0); #endif /* @@ -349,26 +349,26 @@ void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, smp_store_release(&entry->w_ctx.flags, flags); } -static int pblk_rb_sync_point_set(struct pblk_rb *rb, struct bio *bio, +static int pblk_rb_flush_point_set(struct pblk_rb *rb, struct bio *bio, unsigned int pos) { struct pblk_rb_entry *entry; - unsigned int subm, sync_point; + unsigned int subm, flush_point; subm = READ_ONCE(rb->subm); #ifdef CONFIG_NVM_DEBUG - atomic_inc(&rb->inflight_sync_point); + atomic_inc(&rb->inflight_flush_point); #endif if (pos == subm) return 0; - sync_point = (pos == 0) ? (rb->nr_entries - 1) : (pos - 1); - entry = &rb->entries[sync_point]; + flush_point = (pos == 0) ? (rb->nr_entries - 1) : (pos - 1); + entry = &rb->entries[flush_point]; - /* Protect syncs */ - smp_store_release(&rb->sync_point, sync_point); + /* Protect flush points */ + smp_store_release(&rb->flush_point, flush_point); if (!bio) return 0; @@ -416,7 +416,7 @@ void pblk_rb_flush(struct pblk_rb *rb) struct pblk *pblk = container_of(rb, struct pblk, rwb); unsigned int mem = READ_ONCE(rb->mem); - if (pblk_rb_sync_point_set(rb, NULL, mem)) + if (pblk_rb_flush_point_set(rb, NULL, mem)) return; pblk_write_should_kick(pblk); @@ -440,7 +440,7 @@ static int pblk_rb_may_write_flush(struct pblk_rb *rb, unsigned int nr_entries, #ifdef CONFIG_NVM_DEBUG atomic_long_inc(&pblk->nr_flush); #endif - if (pblk_rb_sync_point_set(&pblk->rwb, bio, mem)) + if (pblk_rb_flush_point_set(&pblk->rwb, bio, mem)) *io_ret = NVM_IO_OK; } @@ -607,17 +607,18 @@ try: } if (flags & PBLK_FLUSH_ENTRY) { - unsigned int sync_point; + unsigned int flush_point; - sync_point = READ_ONCE(rb->sync_point); - if (sync_point == pos) { - /* Protect syncs */ - smp_store_release(&rb->sync_point, EMPTY_ENTRY); + flush_point = READ_ONCE(rb->flush_point); + if (flush_point == pos) { + /* Protect flush points */ + smp_store_release(&rb->flush_point, + EMPTY_ENTRY); } flags &= ~PBLK_FLUSH_ENTRY; #ifdef CONFIG_NVM_DEBUG - atomic_dec(&rb->inflight_sync_point); + atomic_dec(&rb->inflight_flush_point); #endif } @@ -746,20 +747,20 @@ unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries) return sync; } -unsigned int pblk_rb_sync_point_count(struct pblk_rb *rb) +unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb) { - unsigned int subm, sync_point; + unsigned int subm, flush_point; unsigned int count; - /* Protect syncs */ - sync_point = smp_load_acquire(&rb->sync_point); - if (sync_point == EMPTY_ENTRY) + /* Protect flush points */ + flush_point = smp_load_acquire(&rb->flush_point); + if (flush_point == EMPTY_ENTRY) return 0; subm = READ_ONCE(rb->subm); /* The sync point itself counts as a sector to sync */ - count = pblk_rb_ring_count(sync_point, subm, rb->nr_entries) + 1; + count = pblk_rb_ring_count(flush_point, subm, rb->nr_entries) + 1; return count; } @@ -801,7 +802,7 @@ int pblk_rb_tear_down_check(struct pblk_rb *rb) if ((rb->mem == rb->subm) && (rb->subm == rb->sync) && (rb->sync == rb->l2p_update) && - (rb->sync_point == EMPTY_ENTRY)) { + (rb->flush_point == EMPTY_ENTRY)) { goto out; } @@ -848,7 +849,7 @@ ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf) queued_entries++; spin_unlock_irq(&rb->s_lock); - if (rb->sync_point != EMPTY_ENTRY) + if (rb->flush_point != EMPTY_ENTRY) offset = scnprintf(buf, PAGE_SIZE, "%u\t%u\t%u\t%u\t%u\t%u\t%u - %u/%u/%u - %d\n", rb->nr_entries, @@ -857,14 +858,14 @@ ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf) rb->sync, rb->l2p_update, #ifdef CONFIG_NVM_DEBUG - atomic_read(&rb->inflight_sync_point), + atomic_read(&rb->inflight_flush_point), #else 0, #endif - rb->sync_point, + rb->flush_point, pblk_rb_read_count(rb), pblk_rb_space(rb), - pblk_rb_sync_point_count(rb), + pblk_rb_flush_point_count(rb), queued_entries); else offset = scnprintf(buf, PAGE_SIZE, @@ -875,13 +876,13 @@ ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf) rb->sync, rb->l2p_update, #ifdef CONFIG_NVM_DEBUG - atomic_read(&rb->inflight_sync_point), + atomic_read(&rb->inflight_flush_point), #else 0, #endif pblk_rb_read_count(rb), pblk_rb_space(rb), - pblk_rb_sync_point_count(rb), + pblk_rb_flush_point_count(rb), queued_entries); return offset; diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c index 6c30b7a6e559..018af87cadee 100644 --- a/drivers/lightnvm/pblk-write.c +++ b/drivers/lightnvm/pblk-write.c @@ -508,7 +508,7 @@ static int pblk_submit_write(struct pblk *pblk) if (!secs_avail) return 1; - secs_to_flush = pblk_rb_sync_point_count(&pblk->rwb); + secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb); if (!secs_to_flush && secs_avail < pblk->min_write_pgs) return 1; diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 8851b18bb099..5f7cd6faa8c7 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -166,7 +166,7 @@ struct pblk_rb { * the last submitted entry that has * been successfully persisted to media */ - unsigned int sync_point; /* Sync point - last entry that must be + unsigned int flush_point; /* Sync point - last entry that must be * flushed to the media. Used with * REQ_FLUSH and REQ_FUA */ @@ -189,7 +189,7 @@ struct pblk_rb { spinlock_t s_lock; /* Sync lock */ #ifdef CONFIG_NVM_DEBUG - atomic_t inflight_sync_point; /* Not served REQ_FLUSH | REQ_FUA */ + atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */ #endif }; @@ -687,7 +687,7 @@ unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb, struct ppa_addr *ppa); void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); -unsigned int pblk_rb_sync_point_count(struct pblk_rb *rb); +unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb); unsigned int pblk_rb_read_count(struct pblk_rb *rb); unsigned int pblk_rb_sync_count(struct pblk_rb *rb); -- 2.30.2