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CONFIG_JBD2_DEBUG: JBD2 (ext4dev/ext4) debugging support

General informations

The Linux kernel configuration item CONFIG_JBD2_DEBUG has multiple definitions:

JBD2 (ext4) debugging support found in fs/jbd2/Kconfig

The configuration item CONFIG_JBD2_DEBUG:

Help text

If you are using the ext4 journaled file system (or potentially any other filesystem/device using JBD2), this option allows you to enable debugging output while the system is running, in order to help track down any problems you are having. By default, the debugging output will be turned off.

If you select Y here, then you will be able to turn on debugging with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a number between 1 and 5. The higher the number, the more debugging output is generated. To turn debugging off again, do "echo 0 > /sys/module/jbd2/parameters/jbd2_debug".

JBD2 (ext4dev/ext4) debugging support found in fs/Kconfig

The configuration item CONFIG_JBD2_DEBUG:

Help text

If you are using the ext4dev/ext4 journaled file system (or potentially any other filesystem/device using JBD2), this option allows you to enable debugging output while the system is running, in order to help track down any problems you are having. By default, the debugging output will be turned off.

If you select Y here, then you will be able to turn on debugging with "echo N > /sys/kernel/debug/jbd2/jbd2-debug", where N is a number between 1 and 5. The higher the number, the more debugging output is generated. To turn debugging off again, do "echo 0 > /sys/kernel/debug/jbd2/jbd2-debug".

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