projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 6da0b38f AD |
2 | config JBD2 |
| 3 | tristate | |
| 4 | select CRC32 | |
| 01b5adce DW |
5 | select CRYPTO |
| 6 | select CRYPTO_CRC32C | |
| 6da0b38f AD |
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 |
| 6da0b38f AD |
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 |
| 6da0b38f AD |
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". |