On Tue, Apr 12, 2022 at 10:09:30PM +0000, Limonciello, Mario wrote:
> [Public]
>
> Hi,
>
> There are a variety of x86 systems that advertise LPI support and as part of negotiation with firmware they don't end up using C-states
> in certain circumstances. This leads to higher runtime power consumption and also failure to enter s2idle.
>
> In mainline there have been changes to block that behavior. Can you please backport these two commits from mainline?
> commit 01f6c7338ce267959975da65d86ba34f44d54220 ("cpuidle: PSCI: Move the `has_lpi` check to the beginning of the function")
> commit eb087f305919ee8169ad65665610313e74260463 ("ACPI: processor idle: Check for architectural support for LPI")
>
> This should go to 5.15.y and later stable kernels.
Queued for 5.4 and newer kernels. If you want this backported to older
ones, please provide a working set of patches.
thanks,
greg k-h
