diff options
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index f8d37a8e2c5..d316662682c 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -520,6 +520,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) init_timer(&q->unplug_timer); setup_timer(&q->timeout, blk_rq_timed_out_timer, (unsigned long) q); INIT_LIST_HEAD(&q->timeout_list); + INIT_LIST_HEAD(&q->pending_barriers); INIT_WORK(&q->unplug_work, blk_unplug_work); kobject_init(&q->kobj, &blk_queue_ktype); @@ -1185,6 +1186,7 @@ static int __make_request(struct request_queue *q, struct bio *bio) const bool sync = (bio->bi_rw & REQ_SYNC); const bool unplug = (bio->bi_rw & REQ_UNPLUG); const unsigned int ff = bio->bi_rw & REQ_FAILFAST_MASK; + int where = ELEVATOR_INSERT_SORT; int rw_flags; /* REQ_HARDBARRIER is no more */ @@ -1203,7 +1205,12 @@ static int __make_request(struct request_queue *q, struct bio *bio) spin_lock_irq(q->queue_lock); - if (unlikely((bio->bi_rw & REQ_HARDBARRIER)) || elv_queue_empty(q)) + if (bio->bi_rw & REQ_HARDBARRIER) { + where = ELEVATOR_INSERT_FRONT; + goto get_rq; + } + + if (elv_queue_empty(q)) goto get_rq; el_ret = elv_merge(q, &req, bio); @@ -1303,7 +1310,7 @@ get_rq: /* insert the request into the elevator */ drive_stat_acct(req, 1); - __elv_add_request(q, req, ELEVATOR_INSERT_SORT, 0); + __elv_add_request(q, req, where, 0); out: if (unplug || !queue_should_plug(q)) __generic_unplug_device(q); |