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    Subject[PATCH v13 7/7] cgroup: list groupoom in cgroup features
    Date
    List groupoom in cgroup features list (exported via
    /sys/kernel/cgroup/features), which can be used by a userspace
    apps (most likely, systemd) to get an idea which cgroup features
    are supported by kernel.

    Signed-off-by: Roman Gushchin <guro@fb.com>
    Cc: Tejun Heo <tj@kernel.org>
    Cc: Michal Hocko <mhocko@kernel.org>
    Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: kernel-team@fb.com
    Cc: cgroups@vger.kernel.org
    Cc: linux-doc@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mm@kvack.org
    ---
    kernel/cgroup/cgroup.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
    index 7338e12979e1..693443282fc1 100644
    --- a/kernel/cgroup/cgroup.c
    +++ b/kernel/cgroup/cgroup.c
    @@ -5922,7 +5922,8 @@ static struct kobj_attribute cgroup_delegate_attr = __ATTR_RO(delegate);
    static ssize_t features_show(struct kobject *kobj, struct kobj_attribute *attr,
    char *buf)
    {
    - return snprintf(buf, PAGE_SIZE, "nsdelegate\n");
    + return snprintf(buf, PAGE_SIZE, "nsdelegate\n"
    + "groupoom\n");
    }
    static struct kobj_attribute cgroup_features_attr = __ATTR_RO(features);

    --
    2.14.3
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