sched/x86: Make CONFIG_SCHED_MC_PRIO=y easier to enable

Right now CONFIG_SCHED_MC_PRIO has X86_INTEL_PSTATE as a dependency,
which is not enabled by default and which hides the CONFIG_SCHED_MC_PRIO
hardware-enabling feature.

Select X86_INTEL_PSTATE instead, plus its dependency (CPU_FREQ), if the
user enables CONFIG_SCHED_MC_PRIO=y.

(Also align the CONFIG_SCHED_MC_PRIO Kconfig help text in standard style.)

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: bp@suse.de
Cc: jolsa@redhat.com
Cc: linux-acpi@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 715c1f3664c43ca6917cd3e07825ce97c7c343a6..b50e5eeefd21d1339253a1f40cfb20b8a0e326ff 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -941,22 +941,24 @@ config SCHED_MC
 
 config SCHED_MC_PRIO
        bool "CPU core priorities scheduler support"
-       depends on SCHED_MC && CPU_SUP_INTEL && X86_INTEL_PSTATE
+       depends on SCHED_MC && CPU_SUP_INTEL
+       select X86_INTEL_PSTATE
+       select CPU_FREQ
        default y
        ---help---
-          Intel Turbo Boost Max Technology 3.0 enabled CPUs have a
-          core ordering determined at manufacturing time, which allows
-          certain cores to reach higher turbo frequencies (when running
-          single threaded workloads) than others.
+         Intel Turbo Boost Max Technology 3.0 enabled CPUs have a
+         core ordering determined at manufacturing time, which allows
+         certain cores to reach higher turbo frequencies (when running
+         single threaded workloads) than others.
 
-          Enabling this kernel feature teaches the scheduler about
-          the TBM3 (aka ITMT) priority order of the CPU cores and adjusts the
-          scheduler's CPU selection logic accordingly, so that higher
-          overall system performance can be achieved.
+         Enabling this kernel feature teaches the scheduler about
+         the TBM3 (aka ITMT) priority order of the CPU cores and adjusts the
+         scheduler's CPU selection logic accordingly, so that higher
+         overall system performance can be achieved.
 
-          This feature will have no effect on CPUs without this feature.
+         This feature will have no effect on CPUs without this feature.
 
-          If unsure say Y here.
+         If unsure say Y here.
 
 source "kernel/Kconfig.preempt"