From b7eef407e5271f5135ce97bfd6e2e5009922331e Mon Sep 17 00:00:00 2001 From: Wu Bo Date: Wed, 22 Feb 2023 09:35:24 +0800 Subject: 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 Acked-by: Darrick J. Wong Link: https://lore.kernel.org/r/20230222013525.14748-1-bo.wu@vivo.com Signed-off-by: Theodore Ts'o --- Documentation/filesystems/ext4/blockgroup.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Documentation') 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 -- cgit v1.2.3