mainline inclusion
from mainline-5.14-rc1
commit 1e4ca26d
category: feature
feature: Deep isolation
bugzilla: https://gitee.com/openeuler/kernel/issues/I4N00D
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1e4ca26d367ae71743e25068e5cd8750ef3f5f7d

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

Rather than waking up all nohz_full CPUs on the system, only wake up
the target CPUs of member threads of the signal.

Reduces interruptions to nohz_full CPUs.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NFrederic Weisbecker <frederic@kernel.org>
Signed-off-by: NIngo Molnar <mingo@kernel.org>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210512232924.150322-8-frederic@kernel.orgSigned-off-by: NYunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: NChao Liu <liuchao173@huawei.com>
Reviewed-by: NChen Hui <judy.chenhui@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>