Commit 029bcbd8 authored by Josh Durgin's avatar Josh Durgin Committed by Sage Weil

rbd: set blk_queue request sizes to object size

This improves performance since more requests can be merged.
Reviewed-by: default avatarYehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: default avatarJosh Durgin <josh.durgin@dreamhost.com>
parent e9852227
......@@ -629,6 +629,14 @@ static int rbd_get_num_segments(struct rbd_image_header *header,
return end_seg - start_seg + 1;
}
/*
* returns the size of an object in the image
*/
static u64 rbd_obj_bytes(struct rbd_image_header *header)
{
return 1 << header->obj_order;
}
/*
* bio helpers
*/
......@@ -1765,6 +1773,13 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
q = blk_init_queue(rbd_rq_fn, &rbd_dev->lock);
if (!q)
goto out_disk;
/* set io sizes to object size */
blk_queue_max_hw_sectors(q, rbd_obj_bytes(&rbd_dev->header) / 512ULL);
blk_queue_max_segment_size(q, rbd_obj_bytes(&rbd_dev->header));
blk_queue_io_min(q, rbd_obj_bytes(&rbd_dev->header));
blk_queue_io_opt(q, rbd_obj_bytes(&rbd_dev->header));
blk_queue_merge_bvec(q, rbd_merge_bvec);
disk->queue = q;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment