From 03661b5f756c92b9924869334a2afa19753c4fe7 Mon Sep 17 00:00:00 2001 From: Hans Holmberg Date: Fri, 13 Oct 2017 14:46:37 +0200 Subject: [PATCH] lightnvm: pblk: start gc if needed during init MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Start GC if needed, directly after init, as we might need to garbage collect in order to make room for user writes. Create a helper function that allows to kick GC without exposing the internals of the GC/rate-limiter interaction. Signed-off-by: Hans Holmberg Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-gc.c | 5 +++++ drivers/lightnvm/pblk-init.c | 4 ++++ drivers/lightnvm/pblk-rl.c | 2 +- drivers/lightnvm/pblk.h | 2 ++ 4 files changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c index 374089fe4326..4bac9e1531f5 100644 --- a/drivers/lightnvm/pblk-gc.c +++ b/drivers/lightnvm/pblk-gc.c @@ -510,6 +510,11 @@ void pblk_gc_should_stop(struct pblk *pblk) pblk_gc_stop(pblk, 0); } +void pblk_gc_should_kick(struct pblk *pblk) +{ + pblk_rl_update_rates(&pblk->rl); +} + void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, int *gc_active) { diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index f08fa2083fbc..ad9f014a086b 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -1025,6 +1025,10 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, pblk->rwb.nr_entries); wake_up_process(pblk->writer_ts); + + /* Check if we need to start GC */ + pblk_gc_should_kick(pblk); + return pblk; fail_stop_writer: diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c index 0896439a91b0..739f855d4216 100644 --- a/drivers/lightnvm/pblk-rl.c +++ b/drivers/lightnvm/pblk-rl.c @@ -96,7 +96,7 @@ unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl) * * Only the total number of free blocks is used to configure the rate limiter. */ -static void pblk_rl_update_rates(struct pblk_rl *rl) +void pblk_rl_update_rates(struct pblk_rl *rl) { struct pblk *pblk = container_of(rl, struct pblk, rl); unsigned long free_blocks = pblk_rl_nr_free_blks(rl); diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 21438d1550a2..29ba7ec32b20 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -830,6 +830,7 @@ int pblk_gc_init(struct pblk *pblk); void pblk_gc_exit(struct pblk *pblk); void pblk_gc_should_start(struct pblk *pblk); void pblk_gc_should_stop(struct pblk *pblk); +void pblk_gc_should_kick(struct pblk *pblk); void pblk_gc_kick(struct pblk *pblk); void pblk_gc_free_full_lines(struct pblk *pblk); void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, @@ -841,6 +842,7 @@ int pblk_gc_sysfs_force(struct pblk *pblk, int force); */ void pblk_rl_init(struct pblk_rl *rl, int budget); void pblk_rl_free(struct pblk_rl *rl); +void pblk_rl_update_rates(struct pblk_rl *rl); int pblk_rl_high_thrs(struct pblk_rl *rl); int pblk_rl_low_thrs(struct pblk_rl *rl); unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); -- GitLab