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authorLen Brown <len.brown@intel.com>2007-12-13 23:50:45 -0500
committerLen Brown <len.brown@intel.com>2007-12-14 00:09:39 -0500
commit4963f62045b64f93c45fbcb6f8f0baf1e3e7a127 (patch)
treef5bd1a7148cc1889af6d8f87c4603550a5aeb909 /drivers/acpi/processor_idle.c
parent60555e371d56a1e410d9fb6fc68f4e953f8f4109 (diff)
cpuidle: create processor.latency_factor tunable
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>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f996d0e37689..26ade1f3f5cd 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -94,6 +94,9 @@ module_param(bm_history, uint, 0644);
94 94
95static int acpi_processor_set_power_policy(struct acpi_processor *pr); 95static int acpi_processor_set_power_policy(struct acpi_processor *pr);
96 96
97#else /* CONFIG_CPU_IDLE */
98static unsigned int latency_factor __read_mostly = 6;
99module_param(latency_factor, uint, 0644);
97#endif 100#endif
98 101
99/* 102/*
@@ -1576,7 +1579,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
1576 1579
1577 snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i); 1580 snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
1578 state->exit_latency = cx->latency; 1581 state->exit_latency = cx->latency;
1579 state->target_residency = cx->latency * 6; 1582 state->target_residency = cx->latency * latency_factor;
1580 state->power_usage = cx->power; 1583 state->power_usage = cx->power;
1581 1584
1582 state->flags = 0; 1585 state->flags = 0;