Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Specify the size of blocks in bytes. Valid block-size values are powers of two
from 1024 up to 65536 (however note that the kernel is able to mount only
filesystems with block-size smaller or equal to the system page size - 4k on
-x86 systems, upto 64k on ppc64 or aarch64 depending on kernel configuration).
+x86 systems, up to 64k on ppc64 or aarch64 depending on kernel configuration).
If omitted, block-size is heuristically determined by the filesystem size and
the expected usage of the filesystem (see the
.B \-T