linux-kernel - Re: cpuinfo shows wrong MHz value

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]

Date:	Wed, 18 Feb 2009 22:05:46 +0100
From:	Frans Pop <elendil@...net.nl>
To:	jplatte@...sa.net
Cc:	Kasper Sandberg <lkml@...anurb.dk>, linux-kernel@...r.kernel.org,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: cpuinfo shows wrong MHz value

On Wednesday 18 February 2009, Joerg Platte wrote:
> The last kernel that was working correct was 2.6.24 (here the output
> from 2.6.24.6):

Right. I suspect then that the following commit may be the cause of the
regression:
commit ed9cbcd40004904dbe61ccc16d6106a7de38c998
Author: Zhao Yakui <yakui.zhao@...el.com>
Date:   Tue Nov 20 14:20:21 2007 -0500
    Revert "speedstep-lib.c: fix frequency multiplier for Pentium4 models 0&1"

That would exactly explain the factor 8 of the error.

Do you have a line like the following in your debug output?
    P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n
If so, what does it say for .24 and .28?

Can you please provide the output of 'x86info -a' (as root) after loading
the cpuid module?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/