> 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.
