config JBD tristate help This is a generic journalling layer for block devices. It is currently used by the ext3 file system, but it could also be used to add journal support to other file systems or block devices such as RAID or LVM. If you are using the ext3 file system, you need to say Y here. If you are not using ext3 then you will probably want to say N. To compile this device as a module, choose M here: the module will be called jbd. If you are compiling ext3 into the kernel, you cannot compile this code as a module. config JBD_DEBUG bool "JBD (ext3) debugging support" depends on JBD && DEBUG_FS help If you are using the ext3 journaled file system (or potentially any other file system/device using JBD), 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/jbd/jbd-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/jbd/jbd-debug".