Skip to contentSkip to conversation

mke2fs.8: Improve valid block size documentation

PATCH Applied Jan Kara 2 participants 2 messages Dec 16, 2020 – Jan 21, 2021

lore
Share & tools
lore

Jan Kara

author
#0 lore raw

PATCH 1/1 mke2fs.8: Improve valid block size documentation

Explain which valid block sizes mke2fs supports in more detail.

Reviewed-by Andreas Dilger <[email protected]>
Signed-off-by Jan Kara <[email protected]>
---
 misc/mke2fs.8.in | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
misc/mke2fs.8.in +6 -4
index e6bfc6d6fd2d..171315b142bc 100644
@@ -207,12 +207,14 @@ manual page for more details.
 .SH OPTIONS
 .TP
 .BI \-b " block-size"
-Specify the size of blocks in bytes.  Valid block-size values are 1024,
-2048 and 4096 bytes per block.  If omitted,
-block-size is heuristically determined by the filesystem size and
+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).
+If omitted, block-size is heuristically determined by the filesystem size and
 the expected usage of the filesystem (see the
 .B \-T
-option).  If
+option).  In most common cases, the default block size is 4k. If
 .I block-size
 is preceded by a negative sign ('-'), then
 .B mke2fs
Signature · 1 line
2.16.4