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| author | Peter Zijlstra <peterz@infradead.org> | 2020-11-18 02:19:43 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-12 12:43:30 +0300 |
| commit | d2dfa17bc7de67e99685c4d6557837bf801a102c (patch) | |
| tree | 6583db24d9515ffcd05dd6369b5094ceb7e6b8ff /kernel/sched/sched.h | |
| parent | c6047c2e3af68dae23ad884249e0d42ff28d2d1b (diff) | |
| download | linux-d2dfa17bc7de67e99685c4d6557837bf801a102c.tar.xz | |
sched: Trivial forced-newidle balancer
When a sibling is forced-idle to match the core-cookie; search for
matching tasks to fill the core.
rcu_read_unlock() can incur an infrequent deadlock in
sched_core_balance(). Fix this by using the RCU-sched flavor instead.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Don Hiatt <dhiatt@digitalocean.com>
Tested-by: Hongyu Ning <hongyu.ning@linux.intel.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lkml.kernel.org/r/20210422123308.800048269@infradead.org
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 4a898abc60ce..91ca1fee9fec 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1170,6 +1170,8 @@ static inline raw_spinlock_t *__rq_lockp(struct rq *rq) bool cfs_prio_less(struct task_struct *a, struct task_struct *b, bool fi); +extern void queue_core_balance(struct rq *rq); + #else /* !CONFIG_SCHED_CORE */ static inline bool sched_core_enabled(struct rq *rq) @@ -1192,6 +1194,10 @@ static inline raw_spinlock_t *__rq_lockp(struct rq *rq) return &rq->__lock; } +static inline void queue_core_balance(struct rq *rq) +{ +} + #endif /* CONFIG_SCHED_CORE */ static inline void lockdep_assert_rq_held(struct rq *rq) |