llext: Add optional compression with LZ4 #98664
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WorldofJARcraft force-pushed the llext-compression branch 7 times, most recently from 9f6d231 to 845ea7f Compare LLEXT extensions can occupy a significant amout of disk space. This commit reduces this by adding optional LZ4 compression. At build time, llext's are compressed using the lz4 command utility. To this end, the compression ratio is configurable via Kconfig and compression statistics can be displayed. At run time, extensions are decompressed using zephyr's lz4 module, relying on the LZ4 frame API. Extensions are forwarded to the decompressor in chunks to reduce the required memory during decompression, with configurable chunk size. Decompressed extensions live in allocated memory. Signed-off-by: Eric Ackermann <eric.ackermann@cispa.de>
WorldofJARcraft force-pushed the llext-compression branch from 845ea7f to 30aebe0 Compare 
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zephyrbot added area: llext zephyrbot requested review from 57300, jeremybettis, lyakh, nashif, nordicjm, pillo79, teburd and tejlmand Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
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LLEXT extensions can occupy a significant amout of disk space. This commit reduces this by adding optional LZ4 compression. At build time, llext's are compressed using the lz4 command utility. To this end, the compression ratio is configurable via Kconfig and compression statistics can be displayed.
At run time, extensions are decompressed using zephyr's lz4 module, relying on the LZ4 frame API.
Extensions are forwarded to the decompressor in chunks to reduce the required memory during decompression, with configurable chunk size. Decompressed extensions live in allocated memory.