Commit da163c22 authored Apr 14, 2021 by Cheng Jian

disable stealing by default

hulk inclusion
category: feature
bugzilla: 38261, https://bugzilla.openeuler.org/show_bug.cgi?id=23


CVE: NA

---------------------------

Steal tasks to improve CPU utilization can solve some performance
problems such as mysql, but not all scenarios are optimized, such as
hackbench.

So turn off by default.

Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

parent 1d2cc076

kernel/sched/features.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -62,7 +62,7 @@ SCHED_FEAT(SIS_PROP, true)
		* Steal a CFS task from another CPU when going idle.
		* Improves CPU utilization.
		*/
		SCHED_FEAT(STEAL, true)
		SCHED_FEAT(STEAL, false)

		/*
		* Issue a WARN when we do multiple update_rq_clock() calls