| Message ID | alpine.LFD.2.00.0905150138001.10065@localhost.localdomain (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
On Fri, 15 May 2009, Len Brown wrote: > From: Len Brown <len.brown@intel.com> > > 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> > --- > drivers/acpi/processor_idle.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c > index e39a40a..e65476f 100644 > --- a/drivers/acpi/processor_idle.c > +++ b/drivers/acpi/processor_idle.c > @@ -582,7 +582,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr) > > pr->power.timer_broadcast_on_state = INT_MAX; > > - for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { > + for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) { > struct acpi_processor_cx *cx = &pr->power.states[i]; > > switch (cx->type) { > -- > 1.6.3.1.9.g95405b > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index e39a40a..e65476f 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -582,7 +582,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr) pr->power.timer_broadcast_on_state = INT_MAX; - for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { + for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) { struct acpi_processor_cx *cx = &pr->power.states[i]; switch (cx->type) {