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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
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2 | config JBD2 |
3 | tristate | |
4 | select CRC32 | |
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5 | select CRYPTO |
6 | select CRYPTO_CRC32C | |
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7 | help |
8 | This is a generic journaling layer for block devices that support | |
9 | both 32-bit and 64-bit block numbers. It is currently used by | |
10 | the ext4 and OCFS2 filesystems, but it could also be used to add | |
11 | journal support to other file systems or block devices such | |
12 | as RAID or LVM. | |
13 | ||
14 | If you are using ext4 or OCFS2, you need to say Y here. | |
15 | If you are not using ext4 or OCFS2 then you will | |
16 | probably want to say N. | |
17 | ||
18 | To compile this device as a module, choose M here. The module will be | |
19 | called jbd2. If you are compiling ext4 or OCFS2 into the kernel, | |
20 | you cannot compile this code as a module. | |
21 | ||
22 | config JBD2_DEBUG | |
23 | bool "JBD2 (ext4) debugging support" | |
75497d06 | 24 | depends on JBD2 |
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25 | help |
26 | If you are using the ext4 journaled file system (or | |
27 | potentially any other filesystem/device using JBD2), this option | |
28 | allows you to enable debugging output while the system is running, | |
29 | in order to help track down any problems you are having. | |
30 | By default, the debugging output will be turned off. | |
31 | ||
32 | If you select Y here, then you will be able to turn on debugging | |
75497d06 | 33 | with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a |
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34 | number between 1 and 5. The higher the number, the more debugging |
35 | output is generated. To turn debugging off again, do | |
75497d06 | 36 | "echo 0 > /sys/module/jbd2/parameters/jbd2_debug". |