PM: hibernate: add sysfs interface for hibernate_compression_threads

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Add a sysfs attribute `/sys/power/hibernate_compression_threads` to
allow runtime configuration of the number of threads used for
compressing and decompressing hibernation images.

The new sysfs interface enables dynamic adjustment at runtime:

    # cat /sys/power/hibernate_compression_threads
    3
    # echo 4 > /sys/power/hibernate_compression_threads

This change provides greater flexibility for debugging and performance
tuning of hibernation without requiring a reboot.

Signed-off-by: Xueqin Luo <luoxueqin@kylinos.cn>
Link: https://patch.msgid.link/c68c62f97fabf32507b8794ad8c16cd22ee656ac.1761046167.git.luoxueqin@kylinos.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Xueqin Luo 2025-10-21 19:37:28 +08:00 • committed by Rafael J. Wysocki

parent 090bf5a0f4

commit ea358066de

2 changed files with 54 additions and 0 deletions

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16

Documentation/ABI/testing/sysfs-power

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38

kernel/power/swap.c

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