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sched/core: Fix unbalance set_rq_online/offline() in sched_cpu_deactivate()

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If cpuset_cpu_inactive() fails, set_rq_online() need be called to rollback.

Fixes: 120455c514 ("sched: Fix hotplug vs CPU bandwidth control")
Cc: stable@kernel.org
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240703031610.587047-5-yangyingliang@huaweicloud.com
This commit is contained in:
Yang Yingliang 2024-07-03 11:16:10 +08:00 committed by Peter Zijlstra
parent 2f02735412
commit fe7a11c78d
1 changed files with 1 additions and 0 deletions
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1
kernel/sched/core.c
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@ -8022,6 +8022,7 @@ int sched_cpu_deactivate(unsigned int cpu)
ret = cpuset_cpu_inactive(cpu);
if (ret) {
sched_smt_present_inc(cpu);
sched_set_rq_online(rq, cpu);
balance_push_set(cpu, false);
set_cpu_active(cpu, true);
sched_update_numa(cpu, true);