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block: mark zone-mgmt bios with REQ_SYNC 

In the current implementation, final zone-mgmt request is issued with
submit_bio_wait() which marks the bio REQ_SYNC. This is needed since
immediate action is expected for zone-mgmt requests as these are
blocking operations. This also bypasses the scheduler in the
blk_mq_make_request() and dispatches the request directly into the
hw ctx.

This patch marks all the chained bios REQ_SYNC so that we can have
above-mentioned behavior for non-final bios also.

Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chaitanya Kulkarni 2020-01-07 13:58:17 -08:00 committed by Jens Axboe
parent 105663f73e
commit 8e42d239cb
1 changed files with 1 additions and 1 deletions
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2
block/blk-zoned.c
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@ -198,7 +198,7 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op,
break;
}
bio->bi_opf = op;
bio->bi_opf = op | REQ_SYNC;
bio->bi_iter.bi_sector = sector;
sector += zone_sectors;