PR sync from: Cheng Yu serein.chengyu@huawei.com
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/5DKTSOX6RZE4H4U22YZTAYDTVAUIY44V/
sched: steal tasks to improve CPU utilization

Cheng Jian (3):
disable stealing by default
sched/fair: introduce SCHED_STEAL
config: enable CONFIG_SCHED_STEAL by default

Steve Sistare (10):
sched: Provide sparsemask, a reduced contention bitmap
sched/topology: Provide hooks to allocate data shared per LLC
sched/topology: Provide cfs_overload_cpus bitmap
sched/fair: Dynamically update cfs_overload_cpus
sched/fair: Hoist idle_stamp up from idle_balance
sched/fair: Generalize the detach_task interface
sched/fair: Provide can_migrate_task_llc
sched/fair: Steal work from an overloaded CPU when CPU goes idle
sched/fair: disable stealing if too many NUMA nodes
sched/fair: Provide idle search schedstats

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2.25.1

#I8PIYZ:【OLK-6.6】支持轻量级任务搜索的steal_task调度特性