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authorDave Jones <davej@redhat.com>2009-03-05 00:16:26 -0500
committerDave Jones <davej@redhat.com>2009-03-05 00:16:26 -0500
commit36e8abf3edcd2d207193ec5741d1a2a645d470a5 (patch)
tree8a4daf38322204c345b3c3f91f3f91d8e231468f
parenteb3092cee79e4efa5d3e9c81c7e6ca90318cebb8 (diff)
[CPUFREQ] Prevent p4-clockmod from auto-binding to the ondemand governor.
The latency of p4-clockmod sucks so hard that scaling on a regular basis with ondemand is a really bad idea. Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Dave Jones <davej@redhat.com>
-rw-r--r--arch/x86/kernel/cpu/cpufreq/p4-clockmod.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index 1778402305e0..352cf9a49164 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -246,7 +246,10 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
cpufreq_frequency_table_get_attr(p4clockmod_table, policy->cpu);
/* cpuinfo and default policy values */
- policy->cpuinfo.transition_latency = 1000000; /* assumed */
+
+ /* the transition latency is set to be 1 higher than the maximum
+ * transition latency of the ondemand governor */
+ policy->cpuinfo.transition_latency = 10000001;
policy->cur = stock_freq;
return cpufreq_frequency_table_cpuinfo(policy, &p4clockmod_table[0]);