From: Tejun Heo <tj@kernel.org>
To: Li Zefan <lizefan@huawei.com>, Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org, kernel-team@fb.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH cgroup/for-4.17 2/2] Subject: cgroup: Limit event generation frequency
Date: Thu, 26 Apr 2018 14:35:14 -0700 [thread overview]
Message-ID: <20180426213514.GV1911913@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <20180323194753.GF2149215@devbig577.frc2.facebook.com>
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@kernel.org>
Applied 1-2 to cgroup/for-4.18.
Thanks.
--
tejun
prev parent reply other threads:[~2018-04-26 21:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-23 19:47 [PATCH cgroup/for-4.17 1/2] cgroup: Explicitly remove core interface files Tejun Heo
2018-03-23 19:47 ` [PATCH cgroup/for-4.17 2/2] Subject: cgroup: Limit event generation frequency Tejun Heo
2018-04-26 21:35 ` Tejun Heo [this message]
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