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From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: containers@lists.linux-foundation.org, linux-mm@kvack.org
Cc: Paul Menage <menage@google.com>, Li Zefan <lizf@cn.fujitsu.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Balbir Singh <balbir@linux.vnet.ibm.com>,
       Pavel Emelyanov <xemul@openvz.org>, linux-kernel@vger.kernel.org,
       "Kirill A. Shutemov" <kirill@shutemov.name>
Subject: [PATCH RFC v0 1/3] cgroup: implement eventfd-based generic API for notifications
Date: Thu, 26 Nov 2009 18:27:36 +0200
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This patch introduces write-only file "cgroup.event_control" in every
cgroup.

To register new notification handler you need:
- create an eventfd;
- open a control file to be monitored. Callbacks register_event() and
  unregister_event() must be defined for the control file;
- write "<event_fd> <control_fd> <args>" to cgroup.event_control.
  Interpretation of args is defined by control file implementation;

eventfd will be woken up by control file implementation or when the
cgroup is removed.

To unregister notification handler just close eventfd.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

-- 
1.6.5.3

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