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* stable: commit "cpuidle: menu: Avoid discarding useful information" causes regressions
@ 2025-10-14  7:43 Sergey Senozhatsky
  2025-10-14  7:47 ` Greg Kroah-Hartman
  2025-10-14  9:50 ` Christian Loehle
  0 siblings, 2 replies; 36+ messages in thread
From: Sergey Senozhatsky @ 2025-10-14  7:43 UTC (permalink / raw)
  To: Rafael J. Wysocki, Greg Kroah-Hartman
  Cc: Artem Bityutskiy, Christian Loehle, Sasha Levin, Daniel Lezcano,
	linux-pm, linux-kernel, Tomasz Figa, Sergey Senozhatsky, stable

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.

^ permalink raw reply	[flat|nested] 36+ messages in thread

end of thread, other threads:[~2025-10-16 10:06 UTC | newest]

Thread overview: 36+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-10-14  7:43 stable: commit "cpuidle: menu: Avoid discarding useful information" causes regressions Sergey Senozhatsky
2025-10-14  7:47 ` Greg Kroah-Hartman
2025-10-14  7:54   ` Sergey Senozhatsky
2025-10-14  8:02     ` Greg Kroah-Hartman
2025-10-14 11:08       ` Sergey Senozhatsky
2025-10-14  9:50 ` Christian Loehle
2025-10-14 10:23   ` Sergey Senozhatsky
2025-10-14 10:25     ` Christian Loehle
2025-10-14 11:55       ` Sergey Senozhatsky
2025-10-14 15:11         ` Christian Loehle
2025-10-14 15:54           ` Rafael J. Wysocki
2025-10-14 17:19             ` Christian Loehle
2025-10-14 17:32               ` Rafael J. Wysocki
2025-10-14 17:50                 ` Rafael J. Wysocki
2025-10-15  1:29             ` Sergey Senozhatsky
2025-10-15  3:41               ` Doug Smythies
2025-10-15  4:50                 ` Sergey Senozhatsky
2025-10-15 14:11                   ` Doug Smythies
2025-10-16  4:59                     ` Sergey Senozhatsky
2025-10-16  9:48                       ` Rafael J. Wysocki
2025-10-16 10:00                         ` Sergey Senozhatsky
2025-10-16 10:05                           ` Rafael J. Wysocki
2025-10-15 11:49                 ` Rafael J. Wysocki
2025-10-15 14:32                   ` Doug Smythies
2025-10-16  9:50                     ` Rafael J. Wysocki
2025-10-15 12:31               ` Rafael J. Wysocki
2025-10-16  4:57                 ` Sergey Senozhatsky
2025-10-15  1:33           ` Sergey Senozhatsky
2025-10-14 13:47     ` Rafael J. Wysocki
2025-10-14 13:56       ` Sergey Senozhatsky
2025-10-14 13:58         ` Christian Loehle
2025-10-14 14:02           ` Rafael J. Wysocki
2025-10-15  1:56             ` Sergey Senozhatsky
2025-10-15 13:08               ` Rafael J. Wysocki
2025-10-16  4:54                 ` Sergey Senozhatsky
2025-10-16  9:47                   ` Rafael J. Wysocki

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