$BTRFS_UTIL_PROG subvolume create "$SCRATCH_MNT/swapvol" >> $seqres.full
swapfile="$SCRATCH_MNT/swapvol/swap"
-_format_swapfile "$swapfile" $(($(get_page_size) * 10))
+_format_swapfile "$swapfile" $(($(get_page_size) * 10)) > /dev/null
swapon "$swapfile"
# Turning off nocow doesn't do anything because the file is not empty, not