kern/117605: request for debug.cpufreq.highest

Arno J. Klaassen arno at
Sun Oct 28 08:50:03 PDT 2007

>Number:         117605
>Category:       kern
>Synopsis:       request for debug.cpufreq.highest
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 28 15:50:02 UTC 2007
>Originator:     Arno J. Klaassen
>Release:        amd64 -6stable
FreeBSD demo 6.2-STABLE FreeBSD 6.2-STABLE #7: Thu Sep 20 12:57:15 CEST 2007     toor at demo:/files/amd64/obj/files/bsd/src6/sys/D470K  amd64

I have a notebook on which cpu-cooling is failing

When running big jobs (or just a simple buildkernel) it will
auto power-off since too hot unless I stop cpufreq and fix frequency to
some intermediate value

I would be nice to have some sysctl debug.cpufreq.highest to tell it not to go higher than a certain freqlevel (as possible with the old acpi_ppc.ko hw.acpi.cpu.px_highest control)

Use acpi_ppc.ko instead (corrected source for some changed ACPI names)


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