Kernel: EROFS and EXT4 File Systems in Linux 5.3

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Huawei Adding New LZ4 Inplace Decompression To EROFS File-System
Huawei's EROFS Linux read-only file-system continues to be improved upon and with the upcoming Linux 5.3 kernel cycle will see yet more improvements.
EROFS has already supported native file-system compression for help conserving space with this read-only file-system Huawei has been working on for use particularly by mobile devices but other use-cases as well. Queued up into staging-next ahead of the Linux 5.3 merge window is a new decompression framework.
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EXT4 Getting Faster Case-Insensitive Performance
The Linux 5.2 kernel brings optional per-directory case-insensitive filenames/folders while with the Linux 5.3 kernel that new EXT4 feature will see better performance.
The EXT4 case-insensitive support relies upon Unicode case handling and preserves the actual case of the directory/files on-disk. It's the look-up process for checking for case-insensitive matches that is being made faster in the latest EXT4 code ahead of Linux 5.3.
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