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authorTejun Heo <tj@kernel.org>2013-11-22 18:20:44 -0500
committerTejun Heo <tj@kernel.org>2013-11-22 18:20:44 -0500
commit3bc942f372af383f49d56aab599469561a5e39ec (patch)
tree91c92e037eea3f556913a8a2f5699d58fdca5f95 /Documentation/cgroups
parent59b6f87344ab5eb3057e5844b8cd8a39e668f477 (diff)
memcg: rename cgroup_event to mem_cgroup_event
cgroup_event is only available in memcg now. Let's brand it that way. While at it, add a comment encouraging deprecation of the feature and remove the respective section from cgroup documentation. This patch is cosmetic. v3: Typo update as per Li Zefan. v2: Index in cgroups.txt updated accordingly as suggested by Li Zefan. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.cz>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/cgroups.txt20
1 files changed, 0 insertions, 20 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index 638bf17ff86..821de56d158 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -24,7 +24,6 @@ CONTENTS:
2.1 Basic Usage
2.2 Attaching processes
2.3 Mounting hierarchies by name
- 2.4 Notification API
3. Kernel API
3.1 Overview
3.2 Synchronization
@@ -472,25 +471,6 @@ you give a subsystem a name.
The name of the subsystem appears as part of the hierarchy description
in /proc/mounts and /proc/<pid>/cgroups.
-2.4 Notification API
---------------------
-
-There is mechanism which allows to get notifications about changing
-status of a cgroup.
-
-To register a new notification handler you need to:
- - create a file descriptor for event notification using eventfd(2);
- - open a control file to be monitored (e.g. memory.usage_in_bytes);
- - 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 a notification handler just close eventfd.
-
-NOTE: Support of notifications should be implemented for the control
-file. See documentation for the subsystem.
3. Kernel API
=============