1 .. SPDX-License-Identifier: GPL-2.0
2
3 High Level Design
4 =================
5
6 An ext4 file system is split into a series of
7 performance difficulties due to fragmentation,
8 very hard to keep each file's blocks within th
9 reducing seek times. The size of a block group
10 ``sb.s_blocks_per_group`` blocks, though it ca
11 ``block_size_in_bytes``. With the default bloc
12 will contain 32,768 blocks, for a length of 12
13 groups is the size of the device divided by th
14
15 All fields in ext4 are written to disk in litt
16 all fields in jbd2 (the journal) are written t
17 order.
18
19 .. include:: blocks.rst
20 .. include:: blockgroup.rst
21 .. include:: special_inodes.rst
22 .. include:: allocators.rst
23 .. include:: checksums.rst
24 .. include:: bigalloc.rst
25 .. include:: inlinedata.rst
26 .. include:: eainode.rst
27 .. include:: verity.rst
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