91f5dac3f6
This patch adds DEFLATE compression algorithm support. It's a good choice to trade off between compression ratios and performance compared to LZ4. Alternatively, DEFLATE could be used for some specific files since EROFS supports multiple compression algorithms in one image. Signed-off-by: Jianan Huang <jnhuang95@gmail.com> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
config FS_EROFS
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bool "Enable EROFS filesystem support"
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help
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This provides support for reading images from EROFS filesystem.
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EROFS (Enhanced Read-Only File System) is a lightweight read-only
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file system for scenarios which need high-performance read-only
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requirements.
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It also provides fixed-sized output compression support, which
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improves storage density, keeps relatively higher compression
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ratios, which is more useful to achieve high performance for
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embedded devices with limited memory.
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config FS_EROFS_ZIP
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bool "EROFS Data Compression Support"
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depends on FS_EROFS
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select LZ4
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default y
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help
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Enable fixed-sized output compression for EROFS.
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If you don't want to enable compression feature, say N.
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config FS_EROFS_ZIP_DEFLATE
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bool "EROFS DEFLATE compressed data support"
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depends on FS_EROFS_ZIP
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select ZLIB
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help
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Saying Y here includes support for reading EROFS file systems
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containing DEFLATE compressed data. It gives better compression
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ratios than the default LZ4 format, while it costs more CPU
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overhead.
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DEFLATE support is an experimental feature for now and so most
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file systems will be readable without selecting this option.
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If unsure, say N.
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