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Revert "Revert "sched/fair: Fixes for capacity inversion detection""

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This reverts commit 937164e07b8e56fa2e34bf05ee956ac4fe6a6b47.

It was perserving the ABI, but that is not needed anymore at this point
in time.

Change-Id: Ie7aaed3a99ce91258f7eae8683ea27b4d807b7b4
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2023-04-28 12:17:27 +00:00
committed by Carlos Llamas
parent 60e138c123
commit dad20f7a85
1 changed files with 11 additions and 2 deletions
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13
kernel/sched/fair.c
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@@ -8798,16 +8798,23 @@ static void update_cpu_capacity(struct sched_domain *sd, int cpu)
* * Thermal pressure will impact all cpus in this perf domain
* equally.
*/
if (static_branch_unlikely(&sched_asym_cpucapacity)) {
if (sched_energy_enabled()) {
unsigned long inv_cap = capacity_orig - thermal_load_avg(rq);
struct perf_domain *pd = rcu_dereference(rq->rd->pd);
struct perf_domain *pd;
rcu_read_lock();
pd = rcu_dereference(rq->rd->pd);
rq->cpu_capacity_inverted = 0;
for (; pd; pd = pd->next) {
struct cpumask *pd_span = perf_domain_span(pd);
unsigned long pd_cap_orig, pd_cap;
/* We can't be inverted against our own pd */
if (cpumask_test_cpu(cpu_of(rq), pd_span))
continue;
cpu = cpumask_any(pd_span);
pd_cap_orig = arch_scale_cpu_capacity(cpu);
@@ -8832,6 +8839,8 @@ static void update_cpu_capacity(struct sched_domain *sd, int cpu)
break;
}
}
rcu_read_unlock();
}
trace_sched_cpu_capacity_tp(rq);