bfq-iosched: don't worry about reserved tags in limit_depth



Reserved tags are used for error handling, we don't need to
care about them for regular IO. The core won't call us for these
anyway.

Acked-by: Paolo Valente <paolo.valente@linaro.org>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 17a51199

block/bfq-iosched.c

+1 −8

Original line number	Diff line number	Diff line
		@@ -542,13 +542,6 @@ static void bfq_limit_depth(unsigned int op, struct blk_mq_alloc_data *data)
		if (op_is_sync(op) && !op_is_write(op))
		return;

		if (data->flags & BLK_MQ_REQ_RESERVED) {
		if (unlikely(!tags->nr_reserved_tags)) {
		WARN_ON_ONCE(1);
		return;
		}
		bt = &tags->breserved_tags;
		} else
		bt = &tags->bitmap_tags;

		if (unlikely(bfqd->sb_shift != bt->sb.shift))