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| author | Zefan Li <lizefan@huawei.com> | 2015-02-13 11:19:49 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-03-02 11:55:04 -0500 |
| commit | 790317e1b266c776765a4bdcedefea706ff0fada (patch) | |
| tree | da14cf2e66b50ab59631292ba306e13fcc0f73e4 /kernel | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
| download | linux-790317e1b266c776765a4bdcedefea706ff0fada.tar.gz linux-790317e1b266c776765a4bdcedefea706ff0fada.tar.bz2 linux-790317e1b266c776765a4bdcedefea706ff0fada.zip | |
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')
| -rw-r--r-- | kernel/cpuset.c | 2 |
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); |