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TOMOYO Linux Cross Reference
Linux/fs/jbd2/Kconfig

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  1 # SPDX-License-Identifier: GPL-2.0-only
  2 config JBD2
  3         tristate
  4         select CRC32
  5         select CRYPTO
  6         select CRYPTO_CRC32C
  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"
 24         depends on JBD2
 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
 33           with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a
 34           number between 1 and 5. The higher the number, the more debugging
 35           output is generated.  To turn debugging off again, do
 36           "echo 0 > /sys/module/jbd2/parameters/jbd2_debug".

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