Update Linux to v5.10.157
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.157.tar.xz
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I7b30d9e98d8c465d6b44de8e7433b4a40b3289ba
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index a3ae00c..aaf9877 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1563,7 +1563,10 @@
* the throttle.
*/
p->dl.dl_throttled = 0;
- BUG_ON(!is_dl_boosted(&p->dl) || flags != ENQUEUE_REPLENISH);
+ if (!(flags & ENQUEUE_REPLENISH))
+ printk_deferred_once("sched: DL de-boosted task PID %d: REPLENISH flag missing\n",
+ task_pid_nr(p));
+
return;
}
@@ -2822,41 +2825,6 @@
}
#ifdef CONFIG_SMP
-int dl_task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed)
-{
- unsigned long flags, cap;
- unsigned int dest_cpu;
- struct dl_bw *dl_b;
- bool overflow;
- int ret;
-
- dest_cpu = cpumask_any_and(cpu_active_mask, cs_cpus_allowed);
-
- rcu_read_lock_sched();
- dl_b = dl_bw_of(dest_cpu);
- raw_spin_lock_irqsave(&dl_b->lock, flags);
- cap = dl_bw_capacity(dest_cpu);
- overflow = __dl_overflow(dl_b, cap, 0, p->dl.dl_bw);
- if (overflow) {
- ret = -EBUSY;
- } else {
- /*
- * We reserve space for this task in the destination
- * root_domain, as we can't fail after this point.
- * We will free resources in the source root_domain
- * later on (see set_cpus_allowed_dl()).
- */
- int cpus = dl_bw_cpus(dest_cpu);
-
- __dl_add(dl_b, p->dl.dl_bw, cpus);
- ret = 0;
- }
- raw_spin_unlock_irqrestore(&dl_b->lock, flags);
- rcu_read_unlock_sched();
-
- return ret;
-}
-
int dl_cpuset_cpumask_can_shrink(const struct cpumask *cur,
const struct cpumask *trial)
{
@@ -2878,7 +2846,7 @@
return ret;
}
-bool dl_cpu_busy(unsigned int cpu)
+int dl_cpu_busy(int cpu, struct task_struct *p)
{
unsigned long flags, cap;
struct dl_bw *dl_b;
@@ -2888,11 +2856,22 @@
dl_b = dl_bw_of(cpu);
raw_spin_lock_irqsave(&dl_b->lock, flags);
cap = dl_bw_capacity(cpu);
- overflow = __dl_overflow(dl_b, cap, 0, 0);
+ overflow = __dl_overflow(dl_b, cap, 0, p ? p->dl.dl_bw : 0);
+
+ if (!overflow && p) {
+ /*
+ * We reserve space for this task in the destination
+ * root_domain, as we can't fail after this point.
+ * We will free resources in the source root_domain
+ * later on (see set_cpus_allowed_dl()).
+ */
+ __dl_add(dl_b, p->dl.dl_bw, dl_bw_cpus(cpu));
+ }
+
raw_spin_unlock_irqrestore(&dl_b->lock, flags);
rcu_read_unlock_sched();
- return overflow;
+ return overflow ? -EBUSY : 0;
}
#endif