re: CVS commit: src

[matthew green <mrg%eterna.com.au@localhost>]

> Module Name:  src
> Committed By: jruoho
> Date:         Fri Aug 27 03:05:26 UTC 2010
> 
> Modified Files:
>       src/share/man/man4: acpicpu.4
>       src/sys/dev/acpi: acpi_cpu.c acpi_cpu.h
> 
> Log Message:
> Fix PR kern/43765 from Scott Ellis.
> 
> Note that the solution is not optimal. If ichlpcib(4) provides SpeedStep
> support, possible I/O resource conflicts may occur with acpicpu(4). Ideally,
> as noted for instance in Windows design documents, ichlpcib(4) should never
> expose SpeedStep when ACPI is being used. The probability for potential race
> conditions is however very small, being limited to few P4-era machines and
> being dependent on user actions.

FWIW, acpi_cpu doesn't work for my P4 with speedstep, and all sorts of
things are missing without acpi (including stability under load.)  it
has no old-skool APM (unlike most laptops from that era.)

not sure exactly what that means here... but maybe acpicpu should 
default to blacklisting P4's?  for when it becomes a normal driver
that is enabled by default..


.mrg.