This week's batch of power management fixes for the Linux 6.11 kernel are just a set of three patches for AMD processors.

Of the AMD power management fixes for Linux 6.11-rc6, one is worth pointing out and it's a fix for the AMD Preferred Core handling. [1]AMD Preferred Core was introduced in Linux 6.9 as a feature that's been around since Zen 2 processors for being able to indicate via ACPI CPPC the CPU cores that are preferred -- capable of reaching a higher maximum frequency or otherwise capable of performing better than the other cores.

With Linux 6.11-rc6 is a fix to remove checks for the highest performance match on AMD Preferred Cores when updating the preferred core ranking within the AMD P-State driver.

The AMD power management fixes have been merged via [2]this pull request ahead of the Linux 6.11-rc6 kernel test release debuting tomorrow. The stable Linux 6.11 kernel should be out around mid-September.

Frustratingly, [3]this one line patch that is a straight forward addition to "fix" the missing CPU power reporting for AMD Zen 5 processors has yet to be picked up by the mainline kernel... Thus looking like it will wait until the Linux 6.12 merge window.



[1] https://www.phoronix.com/news/AMD-P-State-Preferred-Core-69

[2] https://lore.kernel.org/linux-pm/CAJZ5v0jOgpgotLwOMyhURMcfWvAP4rWtWxNbFohqwyEzCJGSSA@mail.gmail.com/

[3] https://lore.kernel.org/linux-pm/20240719101234.50827-1-Dhananjay.Ugwekar@amd.com/