From 6213215bd19926d1063d4e01a248107dab8a899b Mon Sep 17 00:00:00 2001 From: juncheng bai <baijuncheng@xxxxxxxxxxxxxxx> Date: Mon, 15 Jun 2015 18:34:00 +0800 Subject: [PATCH] storage:rbd: make the size of request is equal to the size of the object ensures that the merged size of request can achieve the size of the object. when merge a bio to request or merge a request to request, the sum of the segment number of the current request and the segment number of the bio is not greater than the max segments of the request, so the max size of request is 512k if the max segments of request is BLK_MAX_SEGMENTS. Signed-off-by: juncheng bai <baijuncheng@xxxxxxxxxxxxxxx> --- drivers/block/rbd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 0a54c58..dec6045 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3757,6 +3757,8 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) segment_size = rbd_obj_bytes(&rbd_dev->header); blk_queue_max_hw_sectors(q, segment_size / SECTOR_SIZE); blk_queue_max_segment_size(q, segment_size); + if (segment_size > BLK_MAX_SEGMENTS * PAGE_SIZE) + blk_queue_max_segments(q, segment_size / PAGE_SIZE); blk_queue_io_min(q, segment_size); blk_queue_io_opt(q, segment_size); -- �-- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
