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| author | Nikhil V <[email protected]> | 2024-02-14 07:39:32 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2024-02-22 19:03:21 +0000 |
| commit | 3fec6e5961b77af6a952b77f5c2ea26f7513b216 (patch) | |
| tree | 6c54d2e51921318a64740da20a8f50845e5cf43d /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | Documentation: PM: Fix PCI hibernation support description (diff) | |
| download | kernel-3fec6e5961b77af6a952b77f5c2ea26f7513b216.tar.gz kernel-3fec6e5961b77af6a952b77f5c2ea26f7513b216.zip | |
PM: hibernate: Support to select compression algorithm
Currently the default compression algorithm is selected based on
compile time options. Introduce a module parameter "hibernate.compressor"
to override this behaviour.
Different compression algorithms have different characteristics and
hibernation may benefit when it uses any of these algorithms, especially
when a secondary algorithm(LZ4) offers better decompression speeds over
a default algorithm(LZO), which in turn reduces hibernation image
restore time.
Users can override the default algorithm in two ways:
1) Passing "hibernate.compressor" as kernel command line parameter.
Usage:
LZO: hibernate.compressor=lzo
LZ4: hibernate.compressor=lz4
2) Specifying the algorithm at runtime.
Usage:
LZO: echo lzo > /sys/module/hibernate/parameters/compressor
LZ4: echo lz4 > /sys/module/hibernate/parameters/compressor
Currently LZO and LZ4 are the supported algorithms. LZO is the default
compression algorithm used with hibernation.
Signed-off-by: Nikhil V <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
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