/data partition should be mounted with discard support to take advantage of...

/data partition should be mounted with discard support to take advantage of thinly provisioned images

init

@@ -84,7 +84,7 @@ else
 		    mount -o ro $rootfs /mnt/root
 		fi
 
-		mount $datafs /data
+		mount -o rw,discard $datafs /data
 
 		if [ -f /data/.factorydefault ]; then
 		    echo "Resetting data partition to factory default"
@@ -92,7 +92,7 @@ else
 		    cat /mnt/root/usr/share/factorydefault/data.xz | unxz > $datafs
 		    fsck.ext4 -f -y $datafs > /dev/null 2> /dev/null
 		    resize2fs $datafs > /dev/null 2> /dev/null
-		    mount $datafs /data
+		    mount -o rw,discard $datafs /data
 		fi
 
 		monitors=`/bin/uci -q get -c /data/etc/config rbd.rbd.monitors`