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| author |   Peter Zijlstra <peterz@infradead.org> | 2020-11-17 18:19:43 -0500 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-12 11:43:30 +0200 |
| commit | d2dfa17bc7de67e99685c4d6557837bf801a102c (patch) | |
| tree | 6583db24d9515ffcd05dd6369b5094ceb7e6b8ff /kernel/sched/idle.c | |
| parent | sched/fair: Snapshot the min_vruntime of CPUs on force idle (diff) | |
| download | linux-dev-d2dfa17bc7de67e99685c4d6557837bf801a102c.tar.xz linux-dev-d2dfa17bc7de67e99685c4d6557837bf801a102c.zip | |
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/idle.c')
| -rw-r--r-- | kernel/sched/idle.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 43646e7876d9..912b47aa99d8 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -437,6 +437,7 @@ static void set_next_task_idle(struct rq *rq, struct task_struct *next, bool fir { update_idle_core(rq); schedstat_inc(rq->sched_goidle); + queue_core_balance(rq); } #ifdef CONFIG_SMP |