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authorDave Jones <davej@redhat.com>2005-05-31 19:03:50 -0700
committerDave Jones <davej@redhat.com>2005-05-31 19:03:50 -0700
commite131832ca7d3a3e5f9c7624bb310a7747dc2b57c (patch)
tree35772287945e5ab2b7837ee501a7790ee77f99f4 /drivers/cpufreq
parentc29f1403098135bdef75b190a5037db514701031 (diff)
downloadop-kernel-dev-e131832ca7d3a3e5f9c7624bb310a7747dc2b57c.zip
op-kernel-dev-e131832ca7d3a3e5f9c7624bb310a7747dc2b57c.tar.gz
[CPUFREQ] ondemand governor default sampling downfactor as 1
[PATCH] [5/5] ondemand governor default sampling downfactor as 1 Make default sampling downfactor 1. This works better with earlier auto downscaling change in ondemand governor. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 8bc38ab..c1fc9c6 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -51,7 +51,8 @@ static unsigned int def_sampling_rate;
#define MIN_SAMPLING_RATE (def_sampling_rate / 2)
#define MAX_SAMPLING_RATE (500 * def_sampling_rate)
#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000)
-#define DEF_SAMPLING_DOWN_FACTOR (10)
+#define DEF_SAMPLING_DOWN_FACTOR (1)
+#define MAX_SAMPLING_DOWN_FACTOR (10)
#define TRANSITION_LATENCY_LIMIT (10 * 1000)
static void do_dbs_timer(void *data);
@@ -129,6 +130,9 @@ static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused,
if (ret != 1 )
return -EINVAL;
+ if (input > MAX_SAMPLING_DOWN_FACTOR || input < 1)
+ return -EINVAL;
+
down(&dbs_sem);
dbs_tuners_ins.sampling_down_factor = input;
up(&dbs_sem);
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