[PATCH 012/112] cpuidle: create processor.latency_factor tunable

Len Brown
2008-02-07T09:35:35Z

From: Len Brown <len.brown@intel.com>

Start with default value of 6, so by default,
there is no functional change in this patch.

Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/processor_idle.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f996d0e..26ade1f 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -94,6 +94,9 @@ module_param(bm_history, uint, 0644);

static int acpi_processor_set_power_policy(struct acpi_processor *pr);

+#else /* CONFIG_CPU_IDLE */
+static unsigned int latency_factor __read_mostly = 6;
+module_param(latency_factor, uint, 0644);
#endif

/*
@@ -1576,7 +1579,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)

snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
state->exit_latency = cx->latency;
- state->target_residency = cx->latency * 6;
+ state->target_residency = cx->latency * latency_factor;
state->power_usage = cx->power;

state->flags = 0;
--
1.5.4.23.gef5b9