Created attachment 4800 [details]
Patch to enable C2 and C3 on SMP

Created attachment 4801 [details]
Patch to enable C2 and C3 on SMP

Created attachment 4803 [details]
Patch to enable C2 and C3 on SMP - Take 3

Created attachment 4834 [details]
Patch to enable C2 and C3 on SMP - Take 4

This patch obsoletes all the earlier patches.
Changes from Take 3 version:
- Do a invalid cache before C3 invocation. 
- BM_DISABLE is not required for SMP. Remove Enabling/Disabling and BM history
in SMP case.

If you do an 
#ifdef ARCH_HAS_CSTATE_INIT
void arch_cstate_init(struct acpi_processor_power *pow, unsigned int cpu);
#else
static inline void arch_cstate_init(struct acpi_processor_power *pow, unsigned
int cpu) { return; }
#endif
somewhere in .h 

you can get rid of the #ifdef lines in .c files -- that's the common way of
doing this in the kernel.

also,
+ifdef CONFIG_X86
+processor-objs	+= ../../arch/i386/kernel/acpi/cstate.o
+endif
is ugly. Better EXPORT_SYMBOL() what you need in processor.o, and build
arch/i386/kernel/acpi/cstate.o into the kernel if _PRCOESSOR is m or y.

Created attachment 4837 [details]
Patch to enable C2 and C3 on SMP - Take 5

Obsoletes all earlier pactches.

Changes from patch 4:
- Minor formatting changes
- Changes based on Review comments

Created attachment 4959 [details]
more changes related tp L2 cache and C3 state

applied patch in comment #7 to acpi-test tree 

Created attachment 4979 [details]
Remove some debug printk's from above patch.

Incremental patch over the previous one. Removes some debug printks that were
in the above patch by mistake.

applied comment #9 to-linus

shipped in 2.6.13-rc5 -- closing.