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authorJens Axboe <axboe@kernel.dk>2018-10-12 10:14:46 -0600
committerJens Axboe <axboe@kernel.dk>2018-11-07 13:42:32 -0700
commitf382fb0bcef4c37dc049e9f6963e3baf204d815c (patch)
treedbfbe5689176a03ea1590497f965b40b2f8fd532 /block/elevator.c
parent404b8f5a03d840f74669fd55e26f8e3564cc2dd8 (diff)
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block: remove legacy IO schedulers
Retain the deadline documentation, as that carries over to mq-deadline as well. Tested-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.c')
-rw-r--r--block/elevator.c70
1 files changed, 0 insertions, 70 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 8fdcd64ae12e..54e1adac26c5 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -225,8 +225,6 @@ int elevator_init(struct request_queue *q)
chosen_elevator);
}
- if (!e)
- e = elevator_get(q, CONFIG_DEFAULT_IOSCHED, false);
if (!e) {
printk(KERN_ERR
"Default I/O scheduler not found. Using noop.\n");
@@ -356,68 +354,6 @@ struct request *elv_rb_find(struct rb_root *root, sector_t sector)
}
EXPORT_SYMBOL(elv_rb_find);
-/*
- * Insert rq into dispatch queue of q. Queue lock must be held on
- * entry. rq is sort instead into the dispatch queue. To be used by
- * specific elevators.
- */
-void elv_dispatch_sort(struct request_queue *q, struct request *rq)
-{
- sector_t boundary;
- struct list_head *entry;
-
- if (q->last_merge == rq)
- q->last_merge = NULL;
-
- elv_rqhash_del(q, rq);
-
- q->nr_sorted--;
-
- boundary = q->end_sector;
- list_for_each_prev(entry, &q->queue_head) {
- struct request *pos = list_entry_rq(entry);
-
- if (req_op(rq) != req_op(pos))
- break;
- if (rq_data_dir(rq) != rq_data_dir(pos))
- break;
- if (pos->rq_flags & (RQF_STARTED | RQF_SOFTBARRIER))
- break;
- if (blk_rq_pos(rq) >= boundary) {
- if (blk_rq_pos(pos) < boundary)
- continue;
- } else {
- if (blk_rq_pos(pos) >= boundary)
- break;
- }
- if (blk_rq_pos(rq) >= blk_rq_pos(pos))
- break;
- }
-
- list_add(&rq->queuelist, entry);
-}
-EXPORT_SYMBOL(elv_dispatch_sort);
-
-/*
- * Insert rq into dispatch queue of q. Queue lock must be held on
- * entry. rq is added to the back of the dispatch queue. To be used by
- * specific elevators.
- */
-void elv_dispatch_add_tail(struct request_queue *q, struct request *rq)
-{
- if (q->last_merge == rq)
- q->last_merge = NULL;
-
- elv_rqhash_del(q, rq);
-
- q->nr_sorted--;
-
- q->end_sector = rq_end_sector(rq);
- q->boundary_rq = rq;
- list_add_tail(&rq->queuelist, &q->queue_head);
-}
-EXPORT_SYMBOL(elv_dispatch_add_tail);
-
enum elv_merge elv_merge(struct request_queue *q, struct request **req,
struct bio *bio)
{
@@ -881,12 +817,6 @@ int elv_register(struct elevator_type *e)
list_add_tail(&e->list, &elv_list);
spin_unlock(&elv_list_lock);
- /* print pretty message */
- if (elevator_match(e, chosen_elevator) ||
- (!*chosen_elevator &&
- elevator_match(e, CONFIG_DEFAULT_IOSCHED)))
- def = " (default)";
-
printk(KERN_INFO "io scheduler %s registered%s\n", e->elevator_name,
def);
return 0;