If cpufreq policy has iowait boost enabled, use it. Also make it a schedutil configuration from sysfs so it can be turned on/off if needed (by default use the policy value).
Signed-off-by: Joel Fernandes <[email protected]> --- kernel/sched/cpufreq_schedutil.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index 76877a62b5fa..6915925bc947 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -24,6 +24,7 @@ struct sugov_tunables { struct gov_attr_set attr_set; unsigned int rate_limit_us; + unsigned int iowait_boost_enable; }; struct sugov_policy { @@ -47,6 +48,7 @@ struct sugov_policy { bool work_in_progress; bool need_freq_update; + unsigned int iowait_boost_enable; }; struct sugov_cpu { @@ -171,6 +173,11 @@ static void sugov_get_util(unsigned long *util, unsigned long *max) static void sugov_set_iowait_boost(struct sugov_cpu *sg_cpu, u64 time, unsigned int flags) { + struct sugov_policy *sg_policy = sg_cpu->sg_policy; + + if (!sg_policy->tunables->iowait_boost_enable) + return; + if (flags & SCHED_CPUFREQ_IOWAIT) { sg_cpu->iowait_boost = sg_cpu->iowait_boost_max; } else if (sg_cpu->iowait_boost) { @@ -386,10 +393,34 @@ static ssize_t rate_limit_us_store(struct gov_attr_set *attr_set, const char *bu return count; } +static ssize_t iowait_boost_enable_show(struct gov_attr_set *attr_set, + char *buf) +{ + struct sugov_tunables *tunables = to_sugov_tunables(attr_set); + + return sprintf(buf, "%u\n", tunables->iowait_boost_enable); +} + +static ssize_t iowait_boost_enable_store(struct gov_attr_set *attr_set, + const char *buf, size_t count) +{ + struct sugov_tunables *tunables = to_sugov_tunables(attr_set); + unsigned int enable; + + if (kstrtouint(buf, 10, &enable)) + return -EINVAL; + + tunables->iowait_boost_enable = enable; + + return count; +} + static struct governor_attr rate_limit_us = __ATTR_RW(rate_limit_us); +static struct governor_attr iowait_boost_enable = __ATTR_RW(iowait_boost_enable); static struct attribute *sugov_attributes[] = { &rate_limit_us.attr, + &iowait_boost_enable.attr, NULL }; @@ -543,6 +574,9 @@ static int sugov_init(struct cpufreq_policy *policy) tunables->rate_limit_us *= lat; } + if (policy->iowait_boost_enable) + tunables->iowait_boost_enable = policy->iowait_boost_enable; + policy->governor_data = sg_policy; sg_policy->tunables = tunables; -- 2.13.0.303.g4ebf302169-goog
