max_discard_sectors must be set for the queue to support discard. Operations implementing discard for rbd zero data, so report that.
Signed-off-by: Josh Durgin <[email protected]> --- drivers/block/rbd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index c8fc8fc..8f908c4 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3595,6 +3595,8 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); q->limits.discard_granularity = segment_size; q->limits.discard_alignment = segment_size; + q->limits.max_discard_sectors = segment_size / SECTOR_SIZE; + q->limits.discard_zeroes_data = 1; blk_queue_merge_bvec(q, rbd_merge_bvec); disk->queue = q; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
