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6d92b20103
LZO-RLE extension (run length encoding) was introduced to improve performance of LZO algorithm in scenario of data contains many zeros, zram has changed to use this extended algorithm by default, this patch adds to support this algorithm extension, to enable this extension, it needs to enable F2FS_FS_LZO and F2FS_FS_LZORLE config, and specifies "compress_algorithm=lzo-rle" mountoption. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
139 lines
4 KiB
Text
139 lines
4 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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config F2FS_FS
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tristate "F2FS filesystem support"
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depends on BLOCK
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select NLS
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select CRYPTO
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select CRYPTO_CRC32
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select F2FS_FS_XATTR if FS_ENCRYPTION
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select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
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help
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F2FS is based on Log-structured File System (LFS), which supports
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versatile "flash-friendly" features. The design has been focused on
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addressing the fundamental issues in LFS, which are snowball effect
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of wandering tree and high cleaning overhead.
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Since flash-based storages show different characteristics according to
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the internal geometry or flash memory management schemes aka FTL, F2FS
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and tools support various parameters not only for configuring on-disk
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layout, but also for selecting allocation and cleaning algorithms.
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If unsure, say N.
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config F2FS_STAT_FS
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bool "F2FS Status Information"
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depends on F2FS_FS
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default y
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help
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/sys/kernel/debug/f2fs/ contains information about all the partitions
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mounted as f2fs. Each file shows the whole f2fs information.
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/sys/kernel/debug/f2fs/status includes:
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- major filesystem information managed by f2fs currently
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- average SIT information about whole segments
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- current memory footprint consumed by f2fs.
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config F2FS_FS_XATTR
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bool "F2FS extended attributes"
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depends on F2FS_FS
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default y
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help
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Extended attributes are name:value pairs associated with inodes by
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the kernel or by users (see the attr(5) manual page for details).
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If unsure, say N.
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config F2FS_FS_POSIX_ACL
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bool "F2FS Access Control Lists"
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depends on F2FS_FS_XATTR
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select FS_POSIX_ACL
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default y
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help
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Posix Access Control Lists (ACLs) support permissions for users and
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groups beyond the owner/group/world scheme.
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If you don't know what Access Control Lists are, say N
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config F2FS_FS_SECURITY
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bool "F2FS Security Labels"
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depends on F2FS_FS_XATTR
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help
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Security labels provide an access control facility to support Linux
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Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
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Linux. This option enables an extended attribute handler for file
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security labels in the f2fs filesystem, so that it requires enabling
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the extended attribute support in advance. In particular you need this
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option if you use the setcap command to assign initial process capabi-
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lities to executables (the security.* extended attributes).
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If you are not using a security module, say N.
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config F2FS_CHECK_FS
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bool "F2FS consistency checking feature"
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depends on F2FS_FS
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help
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Enables BUG_ONs which check the filesystem consistency in runtime.
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If you want to improve the performance, say N.
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config F2FS_IO_TRACE
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bool "F2FS IO tracer"
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depends on F2FS_FS
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depends on FUNCTION_TRACER
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help
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F2FS IO trace is based on a function trace, which gathers process
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information and block IO patterns in the filesystem level.
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If unsure, say N.
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config F2FS_FAULT_INJECTION
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bool "F2FS fault injection facility"
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depends on F2FS_FS
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help
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Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on.
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If unsure, say N.
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config F2FS_FS_COMPRESSION
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bool "F2FS compression feature"
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depends on F2FS_FS
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help
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Enable filesystem-level compression on f2fs regular files,
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multiple back-end compression algorithms are supported.
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config F2FS_FS_LZO
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bool "LZO compression support"
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depends on F2FS_FS_COMPRESSION
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select LZO_COMPRESS
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select LZO_DECOMPRESS
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default y
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help
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Support LZO compress algorithm, if unsure, say Y.
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config F2FS_FS_LZ4
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bool "LZ4 compression support"
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depends on F2FS_FS_COMPRESSION
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select LZ4_COMPRESS
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select LZ4_DECOMPRESS
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default y
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help
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Support LZ4 compress algorithm, if unsure, say Y.
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config F2FS_FS_ZSTD
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bool "ZSTD compression support"
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depends on F2FS_FS_COMPRESSION
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select ZSTD_COMPRESS
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select ZSTD_DECOMPRESS
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default y
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help
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Support ZSTD compress algorithm, if unsure, say Y.
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config F2FS_FS_LZORLE
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bool "LZO-RLE compression support"
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depends on F2FS_FS_COMPRESSION
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depends on F2FS_FS_LZO
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select LZO_COMPRESS
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select LZO_DECOMPRESS
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default y
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help
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Support LZO-RLE compress algorithm, if unsure, say Y.
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