nvme: Add support for Autonomous Power State Transition #1444
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Generally, I like this. I'm unsure of what we should do by default... |
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This is a great feature. But for some reason, I think that we can implement it in user space - nvmecontrol(8) |
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Though my approach to configuring APST closely resembles the Linux implementation, I agree that its design could be improved. In particular, I totally agree with @wigneddoom on moving as much functionality as possible out of kernel, though I'm still considering the best way to achieve this. I've marked this PR as a draft, so I can take some time to give it more thought. Please remove the needs-review label for now. |
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Enable use of already existing parameters, necessary for some features such as APST. Signed-off-by: Alexey Sukhoguzov <sap@eseipi.net>
APST is an optional NVMe power-saving feature that allows devices to autonomously enter higher non-operational power states after a certain amount of idle time, reducing the controller's overall power consumption. Signed-off-by: Alexey Sukhoguzov <sap@eseipi.net>
The apst_data tunable allows APST configuration to be adjusted during controller initialization. It accepts an array of encoded integers, each defining specific transition parameters. Signed-off-by: Alexey Sukhoguzov <sap@eseipi.net>
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I've created a revision (D47381) for |
APST is an optional NVMe power-saving feature that allows devices to autonomously enter higher non-operational power states after a certain amount of idle time, reducing the controller's overall power consumption.