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Commit 0fda6b40 authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by Len Brown
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2.6.25 regression: powertop says 120K wakeups/sec 

Patch to fix huge number of wakeups reported due to recent changes in
processor_idle.c. The problem was that the entry_method determination was
broken due to one of the recent commits (bc71bec9) causing
C1 entry to not to go to halt.

http://lkml.org/lkml/2008/3/22/124



Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 4b119e21

drivers/acpi/processor_idle.c

+4 −0
Original line number Diff line number Diff line
@@ -848,6 +848,7 @@ static int acpi_processor_get_power_info_default(struct acpi_processor *pr) 
		/* all processors need to support C1 */

		pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;

		pr->power.states[ACPI_STATE_C1].valid = 1;

		pr->power.states[ACPI_STATE_C1].entry_method = ACPI_CSTATE_HALT;

	}

	/* the C0 state only exists as a filler in our array */

	pr->power.states[ACPI_STATE_C0].valid = 1;
@@ -960,6 +961,9 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) 
				 cx.address);

		}



		if (cx.type == ACPI_STATE_C1) {

			cx.valid = 1;

		}



		obj = &(element->package.elements[2]);

		if (obj->type != ACPI_TYPE_INTEGER)