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CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU: Use percpu multiple decompressors for parallel I/O

General informations

The Linux kernel configuration item CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU:

Help text

By default Squashfs uses a single decompressor but it gives poor performance on parallel I/O workloads when using multiple CPU machines due to waiting on decompressor availability.

This decompressor implementation uses a maximum of one decompressor per core. It uses percpu variables to ensure decompression is load-balanced across the cores.



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