https://bugzilla.kernel.org/show_bug.cgi?id=16105
Len Brown <l...@kernel.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |NEEDINFO
Summary|intel_idle boot hang - Asus |intel_idle boot hang if
|P6T DELUXE X58 motherboard |CONFIG_NO_HZ=n - Asus P6T
| |DELUXE X58 motherboard
--- Comment #24 from Len Brown <l...@kernel.org> 2011-08-01 16:06:23 ---
>> As CONFIG_NO_HZ=n + CONFIG_INTEL_IDLE=y + nolapic_timer works,
>> and CONFIG_NO_HZ=y + CONFIG_INTEL_IDLE=y works,
>> it seems that the failure may be specific
>> to LAPIC timer one-shot mode.
Looks like I said that backwards -- too many double-negatives:-)
Normal Tickless idle (CONFIG_N0_HZ=y) is working fine,
so lapic one-shot mode is working fine.
Old style tickfull idle (CONFIG_NO_HZ=n) is failing,
but it works with nolapic_timer -- so that suggests
LAPIC timer periodic mode is broken.
> Any hint to debug this?
Now that ACPI C-states are enabled in your BIOS,
and it appears that intel_idle and acpi_idle are using
the same states, can you reproduce this issue with acpi via
CONFIG_INTEL_IDLE=n? (or simply boot with intel_idle.max_cstate=0)
If acpi_idle is behaving the same was as intel_idle, then
processor.max_cstate=1 should work
processor.max_cstate=2 should fail
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