lkml.org 
[lkml]   [2009]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC PATCH 1/2] New cgroup subsystem API (->initialize())
From: Balaji Rao <balajirrao@gmail.com>

cgroup: Add ->initialize() to cgroup_subsys structure

Some cgroup subsystems (like cpu controller) would need subsystem
specific initialization. Such subsystems can define ->initialize()
which gets called during cgroup_init() (and not cgroup_init_early()).

Signed-off-by: Balaji Rao <balajirrao@gmail.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
---
Documentation/cgroups/cgroups.txt | 6 ++++++
include/linux/cgroup.h | 1 +
kernel/cgroup.c | 2 ++
3 files changed, 9 insertions(+)

--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -534,6 +534,12 @@ and root cgroup. Currently this will onl
the default hierarchy (which never has sub-cgroups) and a hierarchy
that is being created/destroyed (and hence has no sub-cgroups).

+void initialize(void)
+
+Called during cgroup initialization (cgroup_init()) to do any subsystem
+specific initialization. This is not called during early cgroup
+initialialization (cgroup_init_early().
+
4. Questions
============

--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -359,6 +359,7 @@ struct cgroup_subsys {
struct cgroup *cgrp);
void (*post_clone)(struct cgroup_subsys *ss, struct cgroup *cgrp);
void (*bind)(struct cgroup_subsys *ss, struct cgroup *root);
+ void (*initialize)(void);

int subsys_id;
int active;
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2707,6 +2707,8 @@ int __init cgroup_init(void)
struct cgroup_subsys *ss = subsys[i];
if (!ss->early_init)
cgroup_init_subsys(ss);
+ if (ss->initialize)
+ ss->initialize();
}

/* Add init_css_set to the hash table */

\
 
 \ /
  Last update: 2009-02-25 12:01    [W:0.404 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site