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lightnvm: pblk: issue multiplane reads if possible

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If a read request is sequential and its size aligns with a
multi-plane page size, use the multi-plane hint to process the I/O in
parallel in the controller.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González
2017-06-26 11:57:20 +02:00
committed by Jens Axboe
parent 0880a9aa2d
commit f9c101523d
4 changed files with 51 additions and 12 deletions
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11
drivers/lightnvm/pblk-read.c
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@@ -88,6 +88,11 @@ retry:
bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE);
}
if (pblk_io_aligned(pblk, nr_secs))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
else
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
#ifdef CONFIG_NVM_DEBUG
atomic_long_add(nr_secs, &pblk->inflight_reads);
#endif
@@ -97,8 +102,6 @@ static int pblk_submit_read_io(struct pblk *pblk, struct nvm_rq *rqd)
{
int err;
rqd->flags = pblk_set_read_mode(pblk);
err = pblk_submit_io(pblk, rqd);
if (err)
return NVM_IO_ERR;
@@ -177,6 +180,7 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
rqd->bio = new_bio;
rqd->nr_ppas = nr_holes;
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
rqd->end_io = NULL;
if (unlikely(nr_secs > 1 && nr_holes == 1)) {
@@ -290,6 +294,8 @@ retry:
} else {
rqd->ppa_addr = ppa;
}
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
}
int pblk_submit_read(struct pblk *pblk, struct bio *bio)
@@ -497,6 +503,7 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
rqd.end_io = pblk_end_io_sync;
rqd.private = &wait;
rqd.nr_ppas = *secs_to_gc;
rqd.flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
rqd.bio = bio;
ret = pblk_submit_read_io(pblk, &rqd);