diff options
| -rw-r--r-- | block/bio.c | 2 | ||||
| -rw-r--r-- | block/blk-core.c | 1 | ||||
| -rw-r--r-- | block/blk-merge.c | 14 | ||||
| -rw-r--r-- | include/linux/blk_types.h | 1 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 2 |
5 files changed, 20 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index 89a51bd49ab7..9cf98b29588a 100644 --- a/block/bio.c +++ b/block/bio.c @@ -596,6 +596,7 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src) bio->bi_bdev = bio_src->bi_bdev; bio_set_flag(bio, BIO_CLONED); bio->bi_opf = bio_src->bi_opf; + bio->bi_write_hint = bio_src->bi_write_hint; bio->bi_iter = bio_src->bi_iter; bio->bi_io_vec = bio_src->bi_io_vec; @@ -679,6 +680,7 @@ struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask, return NULL; bio->bi_bdev = bio_src->bi_bdev; bio->bi_opf = bio_src->bi_opf; + bio->bi_write_hint = bio_src->bi_write_hint; bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector; bio->bi_iter.bi_size = bio_src->bi_iter.bi_size; diff --git a/block/blk-core.c b/block/blk-core.c index 3c18ea60cb1c..af393d5a9680 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1765,6 +1765,7 @@ void blk_init_request_from_bio(struct request *req, struct bio *bio) req->ioprio = ioc->ioprio; else req->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0); + req->write_hint = bio->bi_write_hint; blk_rq_bio_prep(req->q, req, bio); } EXPORT_SYMBOL_GPL(blk_init_request_from_bio); diff --git a/block/blk-merge.c b/block/blk-merge.c index 5df13041b851..99038830fb42 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -673,6 +673,13 @@ static struct request *attempt_merge(struct request_queue *q, return NULL; /* + * Don't allow merge of different write hints, or for a hint with + * non-hint IO. + */ + if (req->write_hint != next->write_hint) + return NULL; + + /* * If we are allowed to merge, then append bio list * from next to rq and release next. merge_requests_fn * will have updated segment counts, update sector @@ -791,6 +798,13 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) !blk_write_same_mergeable(rq->bio, bio)) return false; + /* + * Don't allow merge of different write hints, or for a hint with + * non-hint IO. + */ + if (rq->write_hint != bio->bi_write_hint) + return false; + return true; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index e210da6d14b8..d2eb87c84d82 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -56,6 +56,7 @@ struct bio { */ unsigned short bi_flags; /* status, etc and bvec pool number */ unsigned short bi_ioprio; + unsigned short bi_write_hint; struct bvec_iter bi_iter; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index bf2157141d53..0eebd3bcfd85 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -225,6 +225,8 @@ struct request { unsigned int extra_len; /* length of alignment and padding */ + unsigned short write_hint; + unsigned long deadline; struct list_head timeout_list; |