tree ff3811c2c56f56b94ec7687bf943454112591fda
parent 127c501a03d5db8b833e953728d3bcf53c8832a9
author Yunfeng Ye <yeyunfeng@huawei.com> 1605766885 +0800
committer Tejun Heo <tj@kernel.org> 1606342228 -0500

workqueue: Kick a worker based on the actual activation of delayed works

In realtime scenario, We do not want to have interference on the
isolated cpu cores. but when invoking alloc_workqueue() for percpu wq
on the housekeeping cpu, it kick a kworker on the isolated cpu.

  alloc_workqueue
    pwq_adjust_max_active
      wake_up_worker

The comment in pwq_adjust_max_active() said:
  "Need to kick a worker after thawed or an unbound wq's
   max_active is bumped"

So it is unnecessary to kick a kworker for percpu's wq when invoking
alloc_workqueue(). this patch only kick a worker based on the actual
activation of delayed works.

Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>