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Merge branch 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jg…
…arzik/libata-dev * 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev: [libata] AHCI: add hw link power management support [libata] Link power management infrastructure
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This parameter allows the user to set the link (interface) power management. | ||
There are 3 possible options: | ||
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Value Effect | ||
---------------------------------------------------------------------------- | ||
min_power Tell the controller to try to make the link use the | ||
least possible power when possible. This may | ||
sacrifice some performance due to increased latency | ||
when coming out of lower power states. | ||
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max_performance Generally, this means no power management. Tell | ||
the controller to have performance be a priority | ||
over power management. | ||
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medium_power Tell the controller to enter a lower power state | ||
when possible, but do not enter the lowest power | ||
state, thus improving latency over min_power setting. | ||
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