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Commit b546e0c2 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'pm-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 

Pull power management fixes from Rafael Wysocki:
 "These fix two intel_pstate issues related to the way it works when the
  scaling_governor sysfs attribute is set to "performance" and fix up
  messages in the system suspend core code.

  Specifics:

   - Fix a missing KERN_CONT in a system suspend message by converting
     the affected code to using pr_info() and pr_cont() instead of the
     "raw" printk() (Jon Hunter).

   - Make intel_pstate set the CPU P-state from its .set_policy()
     callback when the scaling_governor sysfs attribute is set to
     "performance" so that it interacts with NOHZ_FULL more predictably
     which was the case before 4.7 (Rafael Wysocki).

   - Make intel_pstate always request the maximum allowed P-state when
     the scaling_governor sysfs attribute is set to "performance" to
     prevent it from effectively ingoring that setting is some
     situations (Rafael Wysocki)"

* tag 'pm-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: Always set max P-state in performance mode
  PM / suspend: Fix missing KERN_CONT for suspend message
  cpufreq: intel_pstate: Set P-state upfront in performance mode
parents 1308fd75 8b2ada27

drivers/cpufreq/intel_pstate.c

+32 −6
Original line number Diff line number Diff line
@@ -179,6 +179,7 @@ struct _pid { 
/**

 * struct cpudata -	Per CPU instance data storage

 * @cpu:		CPU number for this instance data

 * @policy:		CPUFreq policy value

 * @update_util:	CPUFreq utility callback information

 * @update_util_set:	CPUFreq utility callback is set

 * @iowait_boost:	iowait-related boost fraction
@@ -201,6 +202,7 @@ struct _pid { 
struct cpudata {

	int cpu;



	unsigned int policy;

	struct update_util_data update_util;

	bool   update_util_set;
@@ -1142,10 +1144,8 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max) 
	*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);

}



static void intel_pstate_set_min_pstate(struct cpudata *cpu)

static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)

{

	int pstate = cpu->pstate.min_pstate;



	trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu);

	cpu->pstate.current_pstate = pstate;

	/*
@@ -1157,6 +1157,20 @@ static void intel_pstate_set_min_pstate(struct cpudata *cpu) 
		      pstate_funcs.get_val(cpu, pstate));

}



static void intel_pstate_set_min_pstate(struct cpudata *cpu)

{

	intel_pstate_set_pstate(cpu, cpu->pstate.min_pstate);

}



static void intel_pstate_max_within_limits(struct cpudata *cpu)

{

	int min_pstate, max_pstate;



	update_turbo_state();

	intel_pstate_get_min_max(cpu, &min_pstate, &max_pstate);

	intel_pstate_set_pstate(cpu, max_pstate);

}



static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)

{

	cpu->pstate.min_pstate = pstate_funcs.get_min();
@@ -1325,7 +1339,8 @@ static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu) 


	from = cpu->pstate.current_pstate;



	target_pstate = pstate_funcs.get_target_pstate(cpu);

	target_pstate = cpu->policy == CPUFREQ_POLICY_PERFORMANCE ?

		cpu->pstate.turbo_pstate : pstate_funcs.get_target_pstate(cpu);



	intel_pstate_update_pstate(cpu, target_pstate);
@@ -1491,7 +1506,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) 
	pr_debug("set_policy cpuinfo.max %u policy->max %u\n",

		 policy->cpuinfo.max_freq, policy->max);



	cpu = all_cpu_data[0];

	cpu = all_cpu_data[policy->cpu];

	cpu->policy = policy->policy;



	if (cpu->pstate.max_pstate_physical > cpu->pstate.max_pstate &&

	    policy->max < policy->cpuinfo.max_freq &&

	    policy->max > cpu->pstate.max_pstate * cpu->pstate.scaling) {
@@ -1499,7 +1516,7 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) 
		policy->max = policy->cpuinfo.max_freq;

	}



	if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {

	if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE) {

		limits = &performance_limits;

		if (policy->max >= policy->cpuinfo.max_freq) {

			pr_debug("set performance\n");
@@ -1535,6 +1552,15 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) 
	limits->max_perf = round_up(limits->max_perf, FRAC_BITS);



 out:

	if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE) {

		/*

		 * NOHZ_FULL CPUs need this as the governor callback may not

		 * be invoked on them.

		 */

		intel_pstate_clear_update_util_hook(policy->cpu);

		intel_pstate_max_within_limits(cpu);

	}



	intel_pstate_set_update_util_hook(policy->cpu);



	intel_pstate_hwp_set_policy(policy);

kernel/power/suspend.c

+2 −2
Original line number Diff line number Diff line
@@ -498,9 +498,9 @@ static int enter_state(suspend_state_t state) 


#ifndef CONFIG_SUSPEND_SKIP_SYNC

	trace_suspend_resume(TPS("sync_filesystems"), 0, true);

	printk(KERN_INFO "PM: Syncing filesystems ... ");

	pr_info("PM: Syncing filesystems ... ");

	sys_sync();

	printk("done.\n");

	pr_cont("done.\n");

	trace_suspend_resume(TPS("sync_filesystems"), 0, false);

#endif