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Commit 875d94f3 authored by Javier González's avatar Javier González Committed by Jens Axboe
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lightnvm: pblk: allocate bio size more accurately



Wait until we know the exact number of ppas to be sent to the device,
before allocating the bio.

Signed-off-by: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6ca2f71f
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+3 −2
Original line number Diff line number Diff line
@@ -552,12 +552,13 @@ unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio,
 * persist data on the write buffer to the media.
 */
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 pos, unsigned int nr_entries,
				 unsigned int count)
{
	struct pblk *pblk = container_of(rb, struct pblk, rwb);
	struct request_queue *q = pblk->dev->q;
	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
	struct bio *bio = rqd->bio;
	struct pblk_rb_entry *entry;
	struct page *page;
	unsigned int pad = 0, to_read = nr_entries;
+10 −10
Original line number Diff line number Diff line
@@ -534,24 +534,24 @@ static int pblk_submit_write(struct pblk *pblk)
	if (!secs_to_flush && secs_avail < pblk->min_write_pgs)
		return 1;

	bio = bio_alloc(GFP_KERNEL, pblk->max_write_pgs);

	bio->bi_iter.bi_sector = 0; /* internal bio */
	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);

	rqd = pblk_alloc_rqd(pblk, WRITE);
	rqd->bio = bio;

	secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, secs_to_flush);
	if (secs_to_sync > pblk->max_write_pgs) {
		pr_err("pblk: bad buffer sync calculation\n");
		goto fail_put_bio;
		return 1;
	}

	secs_to_com = (secs_to_sync > secs_avail) ? secs_avail : secs_to_sync;
	pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com);

	if (pblk_rb_read_to_bio(&pblk->rwb, rqd, bio, pos, secs_to_sync,
	bio = bio_alloc(GFP_KERNEL, secs_to_sync);

	bio->bi_iter.bi_sector = 0; /* internal bio */
	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);

	rqd = pblk_alloc_rqd(pblk, WRITE);
	rqd->bio = bio;

	if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync,
								secs_avail)) {
		pr_err("pblk: corrupted write bio\n");
		goto fail_put_bio;
+2 −2
Original line number Diff line number Diff line
@@ -666,8 +666,8 @@ void pblk_rb_flush(struct pblk_rb *rb);

void pblk_rb_sync_l2p(struct pblk_rb *rb);
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 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);