Merge "sched: add per CPU sched_load_boost knob" (c3f2cc06) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/base/cpu.c

+55 −0

Original line number	Diff line number	Diff line
		@@ -211,6 +211,59 @@ static struct attribute_group cpu_isolated_attr_group = {

		#endif

		static ssize_t show_sched_load_boost(struct device *dev,
		struct device_attribute attr, char buf)
		{
		ssize_t rc;
		unsigned int boost;
		struct cpu *cpu = container_of(dev, struct cpu, dev);
		int cpuid = cpu->dev.id;

		boost = per_cpu(sched_load_boost, cpuid);
		rc = snprintf(buf, PAGE_SIZE-2, "%d\n", boost);

		return rc;
		}

		static ssize_t __ref store_sched_load_boost(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t count)
		{
		int err;
		int boost;
		struct cpu *cpu = container_of(dev, struct cpu, dev);
		int cpuid = cpu->dev.id;

		err = kstrtoint(strstrip((char *)buf), 0, &boost);
		if (err)
		return err;

		/*
		* -100 is low enough to cancel out CPU's load and make it near zro.
		* 1000 is close to the maximum value that cpu_util_freq_{walt,pelt}
		* can take without overflow.
		*/
		if (boost < -100 \|\| boost > 1000)
		return -EINVAL;

		per_cpu(sched_load_boost, cpuid) = boost;

		return count;
		}

		static DEVICE_ATTR(sched_load_boost, 0644,
		show_sched_load_boost,
		store_sched_load_boost);

		static struct attribute *sched_cpu_attrs[] = {
		&dev_attr_sched_load_boost.attr,
		NULL
		};

		static struct attribute_group sched_cpu_attr_group = {
		.attrs = sched_cpu_attrs,
		};

		static const struct attribute_group *common_cpu_attr_groups[] = {
		#ifdef CONFIG_KEXEC
		&crash_note_cpu_attr_group,
		@@ -218,6 +271,7 @@ static const struct attribute_group *common_cpu_attr_groups[] = {
		#ifdef CONFIG_HOTPLUG_CPU
		&cpu_isolated_attr_group,
		#endif
		&sched_cpu_attr_group,
		NULL
		};

		@@ -228,6 +282,7 @@ static const struct attribute_group *hotplugable_cpu_attr_groups[] = {
		#ifdef CONFIG_HOTPLUG_CPU
		&cpu_isolated_attr_group,
		#endif
		&sched_cpu_attr_group,
		NULL
		};