Merge branch 'for-4.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...

[linux-2.6-microblaze.git] / kernel / sched / core.c

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index bf724c1..c94895b 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2601,19 +2601,31 @@ static inline void finish_task(struct task_struct *prev)
 #endif
 }
 
-static inline void finish_lock_switch(struct rq *rq)
+static inline void
+prepare_lock_switch(struct rq *rq, struct task_struct *next, struct rq_flags *rf)
 {
+       /*
+        * Since the runqueue lock will be released by the next
+        * task (which is an invalid locking op but in the case
+        * of the scheduler it's an obvious special-case), so we
+        * do an early lockdep release here:
+        */
+       rq_unpin_lock(rq, rf);
+       spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
 #ifdef CONFIG_DEBUG_SPINLOCK
        /* this is a valid case when another task releases the spinlock */
-       rq->lock.owner = current;
+       rq->lock.owner = next;
 #endif
+}
+
+static inline void finish_lock_switch(struct rq *rq)
+{
        /*
         * If we are tracking spinlock dependencies then we have to
         * fix up the runqueue lock - which gets 'carried over' from
         * prev into current:
         */
        spin_acquire(&rq->lock.dep_map, 0, 0, _THIS_IP_);
-
        raw_spin_unlock_irq(&rq->lock);
 }
 
@@ -2844,14 +2856,7 @@ context_switch(struct rq *rq, struct task_struct *prev,
 
        rq->clock_update_flags &= ~(RQCF_ACT_SKIP|RQCF_REQ_SKIP);
 
-       /*
-        * Since the runqueue lock will be released by the next
-        * task (which is an invalid locking op but in the case
-        * of the scheduler it's an obvious special-case), so we
-        * do an early lockdep release here:
-        */
-       rq_unpin_lock(rq, rf);
-       spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
+       prepare_lock_switch(rq, next, rf);
 
        /* Here we just switch the register state and the stack. */
        switch_to(prev, next, prev);
@@ -6678,13 +6683,18 @@ static int tg_cfs_schedulable_down(struct task_group *tg, void *data)
                parent_quota = parent_b->hierarchical_quota;
 
                /*
-                * Ensure max(child_quota) <= parent_quota, inherit when no
+                * Ensure max(child_quota) <= parent_quota.  On cgroup2,
+                * always take the min.  On cgroup1, only inherit when no
                 * limit is set:
                 */
-               if (quota == RUNTIME_INF)
-                       quota = parent_quota;
-               else if (parent_quota != RUNTIME_INF && quota > parent_quota)
-                       return -EINVAL;
+               if (cgroup_subsys_on_dfl(cpu_cgrp_subsys)) {
+                       quota = min(quota, parent_quota);
+               } else {
+                       if (quota == RUNTIME_INF)
+                               quota = parent_quota;
+                       else if (parent_quota != RUNTIME_INF && quota > parent_quota)
+                               return -EINVAL;
+               }
        }
        cfs_b->hierarchical_quota = quota;