Re: [PATCH v5] PM: QoS: Introduce boot parameter pm_qos_resume_latency_us

[Aaron Tomlin]

On Sun, Apr 26, 2026 at 12:01:27PM -0400, Aaron Tomlin wrote:
> This patch introduces the pm_qos_resume_latency_us kernel boot
> parameter, which allows users to specify distinct resume latency
> constraints for specific CPU ranges.
> 
> 	Syntax: pm_qos_resume_latency_us=range:value;range:value...
> 
> This boot parameter mirrors the sysfs interface behaviour: the special
> string "n/a" imposes a 0us latency constraint (polling), while the
> integer 0 removes the constraint entirely.

Hi Greg, Rafael, Danilo, Pavel, Len,

It has been over a month since I submitted this, so I just wanted to gently
ping this thread.

As a quick reminder, this parameter is highly beneficial for deployments
that prefer to establish strict latency constraints early in the boot
process, eliminating the need to rely on custom user-space tooling later
on.

Patch link: https://lore.kernel.org/lkml/20260426160127.292486-1-atomlin@xxxxxxxxxxx/

Please let me know if you have any conceptual concerns with this approach,
if any further adjustments are required, or if you simply need me to rebase
and resend this against the latest power management tree.

Thank you for your time.


Kind regards
-- 
Aaron Tomlin

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