[PATCH] nvme-pci: Fix the instructions for disabling power management

Bart Van Assche bvanassche at acm.org
Thu Jul 11 12:10:11 PDT 2024


On 7/11/24 12:01 PM, Keith Busch wrote:
> On Wed, Jul 10, 2024 at 04:18:05PM -0700, Bart Van Assche wrote:
>> pcie_aspm=off tells the kernel not to modify the ASPM configuration. This
>> setting does not guarantee that ASPM (Active State Power Management) is
>> disabled. pcie_port_pm=off disables power management for all PCIe ports.
>>
>> This patch has been tested on a workstation with a Samsung SSD 970 EVO Plus
>> NVMe SSD.
> 
> Interesting, didn't know about that parameter. Does this actually aspm
> too, though? It looks like we want aspm policy to be performance for
> that to happen.

Hi Keith,

I don't know the answer to your question. All I know is that the
settings from this patch are required to make the SSD mentioned above
work reliably.

Thanks,

Bart.



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