linux-kernel - [PATCH V2 3/3] block: set ioprio for discard, write-zeroes etc

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Date:   Tue, 20 Aug 2019 23:11:56 -0700
From:   Chaitanya Kulkarni <chaitanya.kulkarni@....com>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     axboe@...nel.dk, Chaitanya Kulkarni <chaitanya.kulkarni@....com>
Subject: [PATCH V2 3/3] block: set ioprio for discard, write-zeroes etc

Set the current process's iopriority for discard.

Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@....com>
---
 block/blk-lib.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/block/blk-lib.c b/block/blk-lib.c
index 5f2c429d4378..500a857e5d9f 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -64,6 +64,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		bio->bi_iter.bi_sector = sector;
 		bio_set_dev(bio, bdev);
 		bio_set_op_attrs(bio, op, 0);
+		bio_set_prio(bio, get_current_ioprio());
 
 		bio->bi_iter.bi_size = req_sects << 9;
 		sector += req_sects;
@@ -162,6 +163,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
 		bio->bi_io_vec->bv_offset = 0;
 		bio->bi_io_vec->bv_len = bdev_logical_block_size(bdev);
 		bio_set_op_attrs(bio, REQ_OP_WRITE_SAME, 0);
+		bio_set_prio(bio, get_current_ioprio());
 
 		if (nr_sects > max_write_same_sectors) {
 			bio->bi_iter.bi_size = max_write_same_sectors << 9;
@@ -234,6 +236,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
 		bio->bi_iter.bi_sector = sector;
 		bio_set_dev(bio, bdev);
 		bio->bi_opf = REQ_OP_WRITE_ZEROES;
+		bio_set_prio(bio, get_current_ioprio());
 		if (flags & BLKDEV_ZERO_NOUNMAP)
 			bio->bi_opf |= REQ_NOUNMAP;
 
@@ -286,6 +289,7 @@ static int __blkdev_issue_zero_pages(struct block_device *bdev,
 		bio->bi_iter.bi_sector = sector;
 		bio_set_dev(bio, bdev);
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+		bio_set_prio(bio, get_current_ioprio());
 
 		while (nr_sects != 0) {
 			sz = min((sector_t) PAGE_SIZE, nr_sects << 9);
-- 
2.17.0