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| author | Javier González <jg@lightnvm.io> | 2017-06-26 11:57:15 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-27 00:24:53 +0200 |
| commit | d624f371d5c17a6e230ffed3f0371a4eb588bf45 (patch) | |
| tree | 8518b6bcd4c0571041142c8637fa8dc38662a005 /drivers/lightnvm/pblk.h | |
| parent | lightnvm: pblk: expose max sec per write on sysfs (diff) | |
| download | linux-d624f371d5c17a6e230ffed3f0371a4eb588bf45.tar.xz linux-d624f371d5c17a6e230ffed3f0371a4eb588bf45.zip | |
lightnvm: pblk: generalize erase path
Erase I/Os are scheduled with the following goals in mind: (i) minimize
LUNs collisions with write I/Os, and (ii) even out the price of erasing
on every write, instead of putting all the burden on when garbage
collection runs. This works well on the current design, but is specific
to the default mapping algorithm.
This patch generalizes the erase path so that other mapping algorithms
can select an arbitrary line to be erased instead. It also gets rid of
the erase semaphore since it creates jittering for user writes.
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/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index edff59aae741..08887d34119e 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -500,7 +500,6 @@ struct pblk { struct pblk_rl rl; int sec_per_write; - struct semaphore erase_sem; unsigned char instance_uuid[16]; #ifdef CONFIG_NVM_DEBUG @@ -583,11 +582,9 @@ void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); void pblk_rb_sync_l2p(struct pblk_rb *rb); -unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct bio *bio, - struct pblk_c_ctx *c_ctx, - unsigned int pos, - unsigned int nr_entries, - unsigned int count); +unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, + struct bio *bio, unsigned int pos, + unsigned int nr_entries, unsigned int count); unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio, struct list_head *list, unsigned int max); @@ -633,7 +630,7 @@ struct pblk_line *pblk_line_replace_data(struct pblk *pblk); int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); struct pblk_line *pblk_line_get_data(struct pblk *pblk); -struct pblk_line *pblk_line_get_data_next(struct pblk *pblk); +struct pblk_line *pblk_line_get_erase(struct pblk *pblk); int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); int pblk_line_is_full(struct pblk_line *line); void pblk_line_free(struct pblk *pblk, struct pblk_line *line); |