Commit b49a5195 authored Apr 29, 2016 by Linus Torvalds

linux-pm

Pull power management fixes from Rafael Wysocki:
 "One revert of a recent cpufreq commit that introduced a regression and
  a fix for intel_pstate's Turbo Activation Ratio handling code.

  Specifics:

   - Revert cpufreq commit that attempted to fix a problem in the
     ondemand/conservative governor code, but did that incorrectly and
     introduced another problem instead (Rafael Wysocki).

   - Fix incorrect decoding of MSR contents related to the Turbo
     Activation Ratio (TAR) handling in the intel_pstate driver
     (Srinivas Pandruvada)"

* tag 'pm+acpi-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: Fix processing for turbo activation ratio
  Revert "cpufreq: governor: Fix negative idle_time when configured with CONFIG_HZ_PERIODIC"

parents a8feb782 81be193b

drivers/cpufreq/cpufreq_governor.c

+2 −6

Original line number	Diff line number	Diff line
		@@ -193,12 +193,8 @@ unsigned int dbs_update(struct cpufreq_policy *policy)
		wall_time = cur_wall_time - j_cdbs->prev_cpu_wall;
		j_cdbs->prev_cpu_wall = cur_wall_time;

		if (cur_idle_time <= j_cdbs->prev_cpu_idle) {
		idle_time = 0;
		} else {
		idle_time = cur_idle_time - j_cdbs->prev_cpu_idle;
		j_cdbs->prev_cpu_idle = cur_idle_time;
		}

		if (ignore_nice) {
		u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];

drivers/cpufreq/intel_pstate.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -813,6 +813,11 @@ static int core_get_max_pstate(void)
		if (err)
		goto skip_tar;

		/* For level 1 and 2, bits[23:16] contain the ratio */
		if (tdp_ctrl)
		tdp_ratio >>= 16;

		tdp_ratio &= 0xff; /* ratios are only 8 bits long */
		if (tdp_ratio - 1 == tar) {
		max_pstate = tar;
		pr_debug("max_pstate=TAC %x\n", max_pstate);