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cgroup: call cgroup_subsys->bind on cgroup subsys initialization

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Currently, we call cgroup_subsys->bind only on unmount, remount, and
when creating a new root on mount. Since the default hierarchy root is
created in cgroup_init, we will not call cgroup_subsys->bind if the
default hierarchy is freshly mounted. As a result, some controllers will
behave incorrectly (most notably, the "memory" controller will not
enable hierarchy support). Fix this by calling cgroup_subsys->bind right
after initializing a cgroup subsystem.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Vladimir Davydov 2015-02-19 17:34:46 +03:00 committed by Tejun Heo
parent 283cb41f42
commit 295458e672
1 changed files with 3 additions and 0 deletions
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3
kernel/cgroup.c
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@ -5040,6 +5040,9 @@ int __init cgroup_init(void)
WARN_ON(cgroup_add_dfl_cftypes(ss, ss->dfl_cftypes));
WARN_ON(cgroup_add_legacy_cftypes(ss, ss->legacy_cftypes));
}
if (ss->bind)
ss->bind(init_css_set.subsys[ssid]);
}
cgroup_kobj = kobject_create_and_add("cgroup", fs_kobj);