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authorWu Bo <bo.wu@vivo.com>2023-02-22 09:35:24 +0800
committerTheodore Ts'o <tytso@mit.edu>2023-03-07 20:24:05 -0500
commitb7eef407e5271f5135ce97bfd6e2e5009922331e (patch)
tree286888af6f279d86a667877c9da2933949ffd392 /Documentation
parentc993799baf9c5861f8df91beb80e1611b12efcbd (diff)
docs: ext4: modify the group desc size to 64
Since the default ext4 group desc size is 64 now (assuming that the 64-bit feature is enbled). And the size mentioned in this doc is 64 too. Change it to 64. Signed-off-by: Wu Bo <bo.wu@vivo.com> Acked-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20230222013525.14748-1-bo.wu@vivo.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/ext4/blockgroup.rst6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/ext4/blockgroup.rst b/Documentation/filesystems/ext4/blockgroup.rst
index 46d78f860623..ed5a5cac6d40 100644
--- a/Documentation/filesystems/ext4/blockgroup.rst
+++ b/Documentation/filesystems/ext4/blockgroup.rst
@@ -105,9 +105,9 @@ descriptors. Instead, the superblock and a single block group descriptor
block is placed at the beginning of the first, second, and last block
groups in a meta-block group. A meta-block group is a collection of
block groups which can be described by a single block group descriptor
-block. Since the size of the block group descriptor structure is 32
-bytes, a meta-block group contains 32 block groups for filesystems with
-a 1KB block size, and 128 block groups for filesystems with a 4KB
+block. Since the size of the block group descriptor structure is 64
+bytes, a meta-block group contains 16 block groups for filesystems with
+a 1KB block size, and 64 block groups for filesystems with a 4KB
blocksize. Filesystems can either be created using this new block group
descriptor layout, or existing filesystems can be resized on-line, and
the field s_first_meta_bg in the superblock will indicate the first