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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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12
drivers/lightnvm/pblk-core.c
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@@ -564,7 +564,6 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
int id = line->id;
int rq_ppas, rq_len;
int cmd_op, bio_op;
int flags;
int i, j;
int ret;
DECLARE_COMPLETION_ONSTACK(wait);
@@ -572,11 +571,9 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
if (dir == WRITE) {
bio_op = REQ_OP_WRITE;
cmd_op = NVM_OP_PWRITE;
flags = pblk_set_progr_mode(pblk, WRITE);
} else if (dir == READ) {
bio_op = REQ_OP_READ;
cmd_op = NVM_OP_PREAD;
flags = pblk_set_read_mode(pblk);
} else
return -EINVAL;
@@ -601,7 +598,6 @@ next_rq:
rqd.bio = bio;
rqd.opcode = cmd_op;
rqd.flags = flags;
rqd.nr_ppas = rq_ppas;
rqd.ppa_list = ppa_list;
rqd.dma_ppa_list = dma_ppa_list;
@@ -609,6 +605,7 @@ next_rq:
rqd.private = &wait;
if (dir == WRITE) {
rqd.flags = pblk_set_progr_mode(pblk, WRITE);
for (i = 0; i < rqd.nr_ppas; ) {
spin_lock(&line->lock);
paddr = __pblk_alloc_page(pblk, line, min);
@@ -621,6 +618,11 @@ next_rq:
for (i = 0; i < rqd.nr_ppas; ) {
struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id);
int pos = pblk_dev_ppa_to_pos(geo, ppa);
int read_type = PBLK_READ_RANDOM;
if (pblk_io_aligned(pblk, rq_ppas))
read_type = PBLK_READ_SEQUENTIAL;
rqd.flags = pblk_set_read_mode(pblk, read_type);
while (test_bit(pos, line->blk_bitmap)) {
paddr += min;
@@ -717,7 +719,7 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
} else if (dir == READ) {
bio_op = REQ_OP_READ;
cmd_op = NVM_OP_PREAD;
flags = pblk_set_read_mode(pblk);
flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
} else
return -EINVAL;