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authorZefan Li <lizefan@huawei.com>2015-02-13 11:19:49 +0800
committerTejun Heo <tj@kernel.org>2015-03-02 11:55:04 -0500
commit790317e1b266c776765a4bdcedefea706ff0fada (patch)
treeda14cf2e66b50ab59631292ba306e13fcc0f73e4 /kernel/cpuset.c
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
downloadlinux-790317e1b266c776765a4bdcedefea706ff0fada.tar.bz2
cpuset: initialize effective masks when clone_children is enabled
If clone_children is enabled, effective masks won't be initialized due to the bug: # mount -t cgroup -o cpuset xxx /mnt # echo 1 > cgroup.clone_children # mkdir /mnt/tmp # cat /mnt/tmp/ # cat cpuset.effective_cpus # cat cpuset.cpus 0-15 And then this cpuset won't constrain the tasks in it. Either the bug or the fix has no effect on unified hierarchy, as there's no clone_chidren flag there any more. Reported-by: Christian Brauner <christianvanbrauner@gmail.com> Reported-by: Serge Hallyn <serge.hallyn@ubuntu.com> Cc: <stable@vger.kernel.org> # 3.17+ Signed-off-by: Zefan Li <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org> Tested-by: Serge Hallyn <serge.hallyn@canonical.com>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 1d1fe9361d29..89d4ed08afba 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1979,7 +1979,9 @@ static int cpuset_css_online(struct cgroup_subsys_state *css)
spin_lock_irq(&callback_lock);
cs->mems_allowed = parent->mems_allowed;
+ cs->effective_mems = parent->mems_allowed;
cpumask_copy(cs->cpus_allowed, parent->cpus_allowed);
+ cpumask_copy(cs->effective_cpus, parent->cpus_allowed);
spin_unlock_irq(&callback_lock);
out_unlock:
mutex_unlock(&cpuset_mutex);