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sched/x86: Make CONFIG_SCHED_MC_PRIO=y easier to enable

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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>
This commit is contained in:
Ingo Molnar 2016-11-30 08:33:54 +01:00
parent de966cf4a4
commit 0a21fc1214
1 changed files with 13 additions and 11 deletions
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24
arch/x86/Kconfig
View File

@ -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"