From: Len Brown <len.brown@intel.com>
Date: Fri, 14 Dec 2007 04:50:45 +0000 (-0500)
Subject: cpuidle: create processor.latency_factor tunable
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4963f62045b64f93c45fbcb6f8f0baf1e3e7a127;p=linux-beck.git

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>
---

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);
 
 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;