0001 # SPDX-License-Identifier: GPL-2.0-only
0002 config JBD2
0003 tristate
0004 select CRC32
0005 select CRYPTO
0006 select CRYPTO_CRC32C
0007 help
0008 This is a generic journaling layer for block devices that support
0009 both 32-bit and 64-bit block numbers. It is currently used by
0010 the ext4 and OCFS2 filesystems, but it could also be used to add
0011 journal support to other file systems or block devices such
0012 as RAID or LVM.
0013
0014 If you are using ext4 or OCFS2, you need to say Y here.
0015 If you are not using ext4 or OCFS2 then you will
0016 probably want to say N.
0017
0018 To compile this device as a module, choose M here. The module will be
0019 called jbd2. If you are compiling ext4 or OCFS2 into the kernel,
0020 you cannot compile this code as a module.
0021
0022 config JBD2_DEBUG
0023 bool "JBD2 (ext4) debugging support"
0024 depends on JBD2
0025 help
0026 If you are using the ext4 journaled file system (or
0027 potentially any other filesystem/device using JBD2), this option
0028 allows you to enable debugging output while the system is running,
0029 in order to help track down any problems you are having.
0030 By default, the debugging output will be turned off.
0031
0032 If you select Y here, then you will be able to turn on debugging
0033 with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a
0034 number between 1 and 5. The higher the number, the more debugging
0035 output is generated. To turn debugging off again, do
0036 "echo 0 > /sys/module/jbd2/parameters/jbd2_debug".
