xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpufreq/schedutil: Rewrite CPUFREQ_RT support

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

9
kernel/sched/rt.c
View File

@@ -957,9 +957,6 @@ static void update_curr_rt(struct rq *rq)
if (unlikely((s64)delta_exec <= 0))
return;
/* Kick cpufreq (see the comment in kernel/sched/sched.h). */
cpufreq_update_util(rq, SCHED_CPUFREQ_RT);
schedstat_set(curr->se.statistics.exec_max,
max(curr->se.statistics.exec_max, delta_exec));
@@ -1001,6 +998,9 @@ dequeue_top_rt_rq(struct rt_rq *rt_rq)
sub_nr_running(rq, rt_rq->rt_nr_running);
rt_rq->rt_queued = 0;
/* Kick cpufreq (see the comment in kernel/sched/sched.h). */
cpufreq_update_util(rq, 0);
}
static void
@@ -1017,6 +1017,9 @@ enqueue_top_rt_rq(struct rt_rq *rt_rq)
add_nr_running(rq, rt_rq->rt_nr_running);
rt_rq->rt_queued = 1;
/* Kick cpufreq (see the comment in kernel/sched/sched.h). */
cpufreq_update_util(rq, 0);
}
#if defined CONFIG_SMP