Re: [EXTERNAL] Re: [PATCH v2 2/2] cpufreq/amd-pstate: Fix the scaling_max_freq setting on shared memory CPPC systems

[Mario Limonciello]

Hi Morgan,

Please apply these 3 commits:

commit 12753d71e8c5 ("ACPI: CPPC: Add helper to get the highest 
performance value")
commit ed429c686b79 ("cpufreq: amd-pstate: Enable amd-pstate preferred 
core support")
commit 3d291fe47fe1 ("cpufreq: amd-pstate: fix the highest frequency 
issue which limits performance")

The first two should help your system, the third will prevent 
introducing a regression on a different one.

Assuming that works we should ask @stable to pull all 3 in to fix this 
regression.

Thanks,

On 9/4/2024 08:57, Mario Limonciello wrote:
> Morgan,
>
> I was referring specfiically to the version that landed in Linus' tree:
> https://git.kernel.org/torvalds/c/8164f7433264
>
> But yeah it's effectively the same thing.  In any case, it's not the 
> solution.
>
> We had some internal discussion and suspect this is due to missing 
> prefcore patches in 6.6 as that feature landed in 6.9.  We'll try to 
> reproduce this on a Rome system and come back with our findings and 
> suggestions what to do.
>
> Thanks,