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cpufreq/schedutil: Rewrite CPUFREQ_RT support

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Instead of trying to duplicate scheduler state to track if an RT task
is running, directly use the scheduler runqueue state for it.

This vastly simplifies things and fixes a number of bugs related to
sugov and the scheduler getting out of sync wrt this state.

As a consequence we not also update the remove cfs/dl state when
iterating the shared mask.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2017-12-20 16:26:12 +01:00
committed by Ingo Molnar
parent 4042d003a0
commit 8f111bc357
3 changed files with 41 additions and 45 deletions
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3
include/linux/sched/cpufreq.h
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@@ -8,8 +8,7 @@
* Interface between cpufreq drivers and the scheduler:
*/
#define SCHED_CPUFREQ_RT (1U << 0)
#define SCHED_CPUFREQ_IOWAIT (1U << 1)
#define SCHED_CPUFREQ_IOWAIT (1U << 0)
#ifdef CONFIG_CPU_FREQ
struct update_util_data {