ACPI: Idle C-states disabled by max_cstate should not disable the TSC

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Processor idle power states C2 and C3 stop the TSC on many machines.
Linux recognizes this situation and marks the TSC as unstable:

Marking TSC unstable due to TSC halts in idle

But if those same machines are booted with "processor.max_cstate=1",
then there is no need to validate C2 and C3, and no need to
disable the TSC, which can be reliably used as a clocksource.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

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This commit is contained in:

Len Brown 2009-05-15 01:29:31 -04:00

parent 520daf7217

commit a0bf284bfe

1 changed files with 1 additions and 1 deletions

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drivers/acpi/processor_idle.c

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