| config UBIFS_FS |
| tristate "UBIFS file system support" |
| select CRC16 |
| select CRC32 |
| select CRYPTO if UBIFS_FS_ADVANCED_COMPR |
| select CRYPTO if UBIFS_FS_LZO |
| select CRYPTO if UBIFS_FS_ZLIB |
| select CRYPTO_LZO if UBIFS_FS_LZO |
| select CRYPTO_DEFLATE if UBIFS_FS_ZLIB |
| depends on MTD_UBI |
| help |
| UBIFS is a file system for flash devices which works on top of UBI. |
| |
| config UBIFS_FS_ADVANCED_COMPR |
| bool "Advanced compression options" |
| depends on UBIFS_FS |
| help |
| This option allows to explicitly choose which compressions, if any, |
| are enabled in UBIFS. Removing compressors means inability to read |
| existing file systems. |
| |
| If unsure, say 'N'. |
| |
| config UBIFS_FS_LZO |
| bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR |
| depends on UBIFS_FS |
| default y |
| help |
| LZO compressor is generally faster than zlib but compresses worse. |
| Say 'Y' if unsure. |
| |
| config UBIFS_FS_ZLIB |
| bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR |
| depends on UBIFS_FS |
| default y |
| help |
| Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. |
| |
| config UBIFS_ATIME_SUPPORT |
| bool "Access time support" if UBIFS_FS |
| depends on UBIFS_FS |
| default n |
| help |
| Originally UBIFS did not support atime, because it looked like a bad idea due |
| increased flash wear. This option adds atime support and it is disabled by default |
| to preserve the old behavior. If you enable this option, UBIFS starts updating atime, |
| which means that file-system read operations will cause writes (inode atime |
| updates). This may affect file-system performance and increase flash device wear, |
| so be careful. How often atime is updated depends on the selected strategy: |
| strictatime is the "heavy", relatime is "lighter", etc. |
| |
| If unsure, say 'N' |
