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authorLen Brown <len.brown@intel.com>2009-05-15 01:29:31 -0400
committerLen Brown <len.brown@intel.com>2009-05-16 01:52:39 -0400
commita0bf284bfedd6dc95bbee7ebf5ccf3b5f753a008 (patch)
tree2cad50754a5af8ac5dd03fae5977bcf0ec88dd1c /include/linux/percpu.h
parent520daf7217bc1806c02eb4cfa7805447a3da2f66 (diff)
ACPI: Idle C-states disabled by max_cstate should not disable the TSC
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>
Diffstat (limited to 'include/linux/percpu.h')
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