Re: Linux v2.6.12-rc6

Johannes Stezenbach
2005-06-08T11:38:56Z

Brice Goglin wrote:
> Johannes Stezenbach a écrit :
> > Johannes Stezenbach wrote:
> >
> >>Hype-threading stopped working for me (probably due to
> >>me not enabling ACPI). dmesg output and .config attached.
> >>-rc5 worked fine. The board is an Asus P4P800-Deluxe.
> >>
> >>dmesg: WARNING: 1 siblings found for CPU0, should be 2
> >
> >
> > Indeed SMT works fine if I enable ACPI.
> > Is SMT without ACPI not supported?
>
> You can pass acpi=ht into the kernel command line to disable
> ACPI except the minimum required to get HT support.

That's nice, but I was thinking along the lines of:

diff -ur linux-2.6.12-rc6.orig/arch/i386/Kconfig linux-2.6.12-rc6/arch/i386/Kconfig
--- linux-2.6.12-rc6.orig/arch/i386/Kconfig 2005-06-06 23:16:27.000000000 +0200
+++ linux-2.6.12-rc6/arch/i386/Kconfig 2005-06-08 13:35:08.000000000 +0200
@@ -503,7 +503,7 @@

config SCHED_SMT
bool "SMT (Hyperthreading) scheduler support"
- depends on SMP
+ depends on SMP && ACPI
default off
help
SMT scheduler support improves the CPU scheduler's decision making

Comments? Is this intended?

Johannes