ACPI: Use the ARB_DISABLE for the CPU which model id is less than 0x0f.

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Currently, ARB_DISABLE is a NOP on all of the recent Intel platforms.
For such platforms, reduce contention on c3_lock by skipping the fake
ARB_DISABLE.

The cpu model id on one laptop is 14. If we disable ARB_DISABLE on this box,
the box can't be booted correctly. But if we still enable ARB_DISABLE on this
box, the box can be booted correctly.

So we still use the ARB_DISABLE for the cpu which mode id is less than 0x0f.

http://bugzilla.kernel.org/show_bug.cgi?id=14700

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>

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Zhao Yakui 2009-12-11 15:17:20 +08:00 • committed by Len Brown

parent 22763c5cf3

commit 03a05ed115

1 changed files with 1 additions and 1 deletions

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arch/x86/kernel/acpi/cstate.c

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