Re: [PATCH cgroup/for-4.17 2/2] Subject: cgroup: Limit event generation frequency

From: Tejun Heo
Date: Thu Apr 26 2018 - 17:35:24 EST

On Fri, Mar 23, 2018 at 12:47:53PM -0700, Tejun Heo wrote:
> ".events" files generate file modified event to notify userland of
> possible new events. Some of the events can be quite bursty
> (e.g. memory high event) and generating notification each time is
> costly and pointless.
> This patch implements a event rate limit mechanism. If a new
> notification is requested before 10ms has passed since the previous
> notification, the new notification is delayed till then.
> As this only delays from the second notification on in a given close
> cluster of notifications, userland reactions to notifications
> shouldn't be delayed at all in most cases while avoiding notification
> storms.
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>

Applied 1-2 to cgroup/for-4.18.