2008-07-14 16:08:38 +00:00
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config UBIFS_FS
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tristate "UBIFS file system support"
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select CRC16
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select CRC32
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select CRYPTO if UBIFS_FS_ADVANCED_COMPR
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select CRYPTO if UBIFS_FS_LZO
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select CRYPTO if UBIFS_FS_ZLIB
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select CRYPTO_LZO if UBIFS_FS_LZO
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select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
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depends on MTD_UBI
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help
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UBIFS is a file system for flash devices which works on top of UBI.
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config UBIFS_FS_ADVANCED_COMPR
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bool "Advanced compression options"
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depends on UBIFS_FS
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help
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This option allows to explicitly choose which compressions, if any,
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2009-01-26 10:12:25 +00:00
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are enabled in UBIFS. Removing compressors means inability to read
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2008-07-14 16:08:38 +00:00
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existing file systems.
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If unsure, say 'N'.
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config UBIFS_FS_LZO
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bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
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depends on UBIFS_FS
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default y
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help
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2009-01-26 10:12:25 +00:00
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LZO compressor is generally faster than zlib but compresses worse.
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2008-07-14 16:08:38 +00:00
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Say 'Y' if unsure.
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config UBIFS_FS_ZLIB
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bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
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depends on UBIFS_FS
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default y
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help
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2008-10-16 17:02:37 +00:00
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Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
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2015-11-07 04:46:11 +00:00
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config UBIFS_ATIME_SUPPORT
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bool "Access time support" if UBIFS_FS
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depends on UBIFS_FS
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default n
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help
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Originally UBIFS did not support atime, because it looked like a bad idea due
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increased flash wear. This option adds atime support and it is disabled by default
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to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
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which means that file-system read operations will cause writes (inode atime
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updates). This may affect file-system performance and increase flash device wear,
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so be careful. How often atime is updated depends on the selected strategy:
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strictatime is the "heavy", relatime is "lighter", etc.
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If unsure, say 'N'
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