On Thu, 22 Sep 2016 19:29:08 +0200, Greg Kroah-Hartman wrote: > > 4.4-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Zefan Li <lize...@huawei.com> > > commit 06f4e94898918bcad00cdd4d349313a439d6911e upstream. > > A new task inherits cpus_allowed and mems_allowed masks from its parent, > but if someone changes cpuset's config by writing to cpuset.cpus/cpuset.mems > before this new task is inserted into the cgroup's task list, the new task > won't be updated accordingly. > > Signed-off-by: Zefan Li <lize...@huawei.com> > Signed-off-by: Tejun Heo <t...@kernel.org> > Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> > > --- > kernel/cpuset.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > --- a/kernel/cpuset.c > +++ b/kernel/cpuset.c > @@ -2074,6 +2074,20 @@ static void cpuset_bind(struct cgroup_su > mutex_unlock(&cpuset_mutex); > } > > +/* > + * Make sure the new task conform to the current state of its parent, > + * which could have been changed by cpuset just after it inherits the > + * state from the parent and before it sits on the cgroup's task list. > + */ > +void cpuset_fork(struct task_struct *task)
This causes a build warning: kernel/cpuset.c:2101:2: warning: (near initialization for 'cpuset_cgrp_subsys.fork') [enabled by default] .fork = cpuset_fork, ^ where fork op in 4.4 kernel has still priv argument that was dropped recently. Takashi
