On 10/14/25 08:43, Sergey Senozhatsky wrote:
Hello,
We are observing performance regressions (cpu usage, power consumption, dropped frames in video playback test, etc.) after updating to recent stable kernels. We tracked it down to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674 in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information", upstream commit 85975daeaa4).
Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using invalid recent intervals data") doesn't address the problems we are observing. Revert seems to be bringing performance metrics back to pre-regression levels.
Any details would be much appreciated. How do the idle state usages differ with and without "cpuidle: menu: Avoid discarding useful information"? What do the idle states look like in your platform?