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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2008-04-09 21:31:46 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-24 20:05:01 -0400 |
| commit | 0fda6b403f0eca66ad8a7c946b3996e359100443 (patch) | |
| tree | dba222ea4c6f456a1521956f32631ab834a64886 /drivers/acpi/processor_idle.c | |
| parent | 4b119e21d0c66c22e8ca03df05d9de623d0eb50f (diff) | |
| download | linux-0fda6b403f0eca66ad8a7c946b3996e359100443.tar.gz linux-0fda6b403f0eca66ad8a7c946b3996e359100443.tar.bz2 linux-0fda6b403f0eca66ad8a7c946b3996e359100443.zip | |
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 <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 4 |
1 files changed, 4 insertions, 0 deletions
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) |