From: Venkatesh Pallipadi Date: Thu, 10 Apr 2008 01:31:46 +0000 (-0400) Subject: 2.6.25 regression: powertop says 120K wakeups/sec X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0fda6b403f0eca66ad8a7c946b3996e359100443;p=linux-beck.git 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 (bc71bec91f987) causing C1 entry to not to go to halt. http://lkml.org/lkml/2008/3/22/124 Signed-off-by: Venkatesh Pallipadi Signed-off-by: Len Brown --- diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 788da9781f80..836362b50faa 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -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)