linux-kernel - Re: stable: commit "cpuidle: menu: Avoid discarding useful information" causes regressions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2zreguw4djctgcmvgticnm4dctcuja7yfnp3r6bxaqon3i2pxf@thee3p3qduoq>
Date: Tue, 14 Oct 2025 19:23:31 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Christian Loehle <christian.loehle@....com>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>, 
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>, Sasha Levin <sashal@...nel.org>, 
	Daniel Lezcano <daniel.lezcano@...aro.org>, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Tomasz Figa <tfiga@...omium.org>, stable@...r.kernel.org
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions

On (25/10/14 10:50), Christian Loehle wrote:
> > 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?

Sure, I can run tests.  How do I get the numbers/stats
that you are asking for?