Tejun Heo b12e358328 cgroup: Limit event generation frequency
".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>
2018-04-26 14:29:04 -07:00
2018-04-15 17:21:30 -07:00
2018-04-26 11:06:36 -07:00
2018-01-06 10:59:44 -07:00
2018-04-24 13:17:08 -04:00
2018-04-15 17:21:30 -07:00
2018-04-21 10:32:16 -07:00
2018-03-28 16:09:09 +02:00
2018-04-15 17:21:30 -07:00
2017-11-17 17:45:29 -08:00
2018-04-25 21:05:15 -07:00
2018-04-22 19:20:09 -07:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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