nbd: set the max segments to USHRT_MAX

I lack the basic understanding of what segments mean, so we were being limited to 512kib requests even with higher max_sectors sizes set. Setting the maximum number of segments to unlimited allows us to actually have arbitrarily large IO's go through NBD. Signed-off-by: Josef Bacik <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
kawasaki · Apr 21, 2017 · 1cc1f17 · 1cc1f17
1 parent 246665d
commit 1cc1f17
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
@@ -1470,6 +1470,7 @@ static int nbd_dev_add(int index)
 	disk->queue->limits.discard_granularity = 512;
 	blk_queue_max_discard_sectors(disk->queue, UINT_MAX);
 	blk_queue_max_segment_size(disk->queue, UINT_MAX);
+	blk_queue_max_segments(disk->queue, USHRT_MAX);
 	blk_queue_max_hw_sectors(disk->queue, 65536);
 	disk->queue->limits.max_sectors = 256;