13 Mar
2018
13 Mar
'18
8:41 p.m.
(cc'ing Roman)
Hello,
On Tue, Mar 06, 2018 at 03:46:56PM -0800, Matt Roper wrote:
+static inline struct cgroup * +task_get_dfl_cgroup(struct task_struct *task) +{
- struct cgroup *cgrp;
- mutex_lock(&cgroup_mutex);
- cgrp = task_dfl_cgroup(task);
- cgroup_get(cgrp);
- mutex_unlock(&cgroup_mutex);
Heh, this is super heavy. Can't we do "rcu, try get, compare & retry"?
Thanks.
--
tejun