1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 26da0b38fSAlexey Dobriyanconfig JBD2 36da0b38fSAlexey Dobriyan tristate 46da0b38fSAlexey Dobriyan select CRC32 501b5adceSDarrick J. Wong select CRYPTO 601b5adceSDarrick J. Wong select CRYPTO_CRC32C 76da0b38fSAlexey Dobriyan help 86da0b38fSAlexey Dobriyan This is a generic journaling layer for block devices that support 96da0b38fSAlexey Dobriyan both 32-bit and 64-bit block numbers. It is currently used by 106da0b38fSAlexey Dobriyan the ext4 and OCFS2 filesystems, but it could also be used to add 116da0b38fSAlexey Dobriyan journal support to other file systems or block devices such 126da0b38fSAlexey Dobriyan as RAID or LVM. 136da0b38fSAlexey Dobriyan 146da0b38fSAlexey Dobriyan If you are using ext4 or OCFS2, you need to say Y here. 156da0b38fSAlexey Dobriyan If you are not using ext4 or OCFS2 then you will 166da0b38fSAlexey Dobriyan probably want to say N. 176da0b38fSAlexey Dobriyan 186da0b38fSAlexey Dobriyan To compile this device as a module, choose M here. The module will be 196da0b38fSAlexey Dobriyan called jbd2. If you are compiling ext4 or OCFS2 into the kernel, 206da0b38fSAlexey Dobriyan you cannot compile this code as a module. 216da0b38fSAlexey Dobriyan 226da0b38fSAlexey Dobriyanconfig JBD2_DEBUG 236da0b38fSAlexey Dobriyan bool "JBD2 (ext4) debugging support" 2475497d06SPaul Gortmaker depends on JBD2 256da0b38fSAlexey Dobriyan help 266da0b38fSAlexey Dobriyan If you are using the ext4 journaled file system (or 276da0b38fSAlexey Dobriyan potentially any other filesystem/device using JBD2), this option 286da0b38fSAlexey Dobriyan allows you to enable debugging output while the system is running, 296da0b38fSAlexey Dobriyan in order to help track down any problems you are having. 306da0b38fSAlexey Dobriyan By default, the debugging output will be turned off. 316da0b38fSAlexey Dobriyan 326da0b38fSAlexey Dobriyan If you select Y here, then you will be able to turn on debugging 3375497d06SPaul Gortmaker with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a 346da0b38fSAlexey Dobriyan number between 1 and 5. The higher the number, the more debugging 356da0b38fSAlexey Dobriyan output is generated. To turn debugging off again, do 3675497d06SPaul Gortmaker "echo 0 > /sys/module/jbd2/parameters/jbd2_debug". 37