From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/kernel/sched/cpudeadline.c | 34 +++++++++++++++++++++++++++-------
1 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/kernel/kernel/sched/cpudeadline.c b/kernel/kernel/sched/cpudeadline.c
index 5031645..8cb06c8 100644
--- a/kernel/kernel/sched/cpudeadline.c
+++ b/kernel/kernel/sched/cpudeadline.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* kernel/sched/cpudl.c
*
* Global CPU deadline management
*
* Author: Juri Lelli <j.lelli@sssup.it>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
*/
#include "sched.h"
@@ -124,14 +120,38 @@
const struct sched_dl_entity *dl_se = &p->dl;
if (later_mask &&
- cpumask_and(later_mask, cp->free_cpus, &p->cpus_allowed)) {
+ cpumask_and(later_mask, cp->free_cpus, p->cpus_ptr)) {
+ unsigned long cap, max_cap = 0;
+ int cpu, max_cpu = -1;
+
+ if (!static_branch_unlikely(&sched_asym_cpucapacity))
+ return 1;
+
+ /* Ensure the capacity of the CPUs fits the task. */
+ for_each_cpu(cpu, later_mask) {
+ if (!dl_task_fits_capacity(p, cpu)) {
+ cpumask_clear_cpu(cpu, later_mask);
+
+ cap = capacity_orig_of(cpu);
+
+ if (cap > max_cap ||
+ (cpu == task_cpu(p) && cap == max_cap)) {
+ max_cap = cap;
+ max_cpu = cpu;
+ }
+ }
+ }
+
+ if (cpumask_empty(later_mask))
+ cpumask_set_cpu(max_cpu, later_mask);
+
return 1;
} else {
int best_cpu = cpudl_maximum(cp);
WARN_ON(best_cpu != -1 && !cpu_present(best_cpu));
- if (cpumask_test_cpu(best_cpu, &p->cpus_allowed) &&
+ if (cpumask_test_cpu(best_cpu, p->cpus_ptr) &&
dl_time_before(dl_se->deadline, cp->elements[0].dl)) {
if (later_mask)
cpumask_set_cpu(best_cpu, later_mask);
--
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