Sasha reported a lockdep warning when OOM was triggered. The reason is cgroup_name() should be called with rcu_read_lock() held. Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx> Signed-off-by: Li Zefan <lizefan@xxxxxxxxxx> --- This fix is for 3.10 --- kernel/cpuset.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/cpuset.c b/kernel/cpuset.c index c55763b..98d458a 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2599,6 +2599,7 @@ void cpuset_print_task_mems_allowed(struct task_struct *tsk) struct cgroup *cgrp = task_cs(tsk)->css.cgroup; + rcu_read_lock(); spin_lock(&cpuset_buffer_lock); nodelist_scnprintf(cpuset_nodelist, CPUSET_NODELIST_LEN, @@ -2607,6 +2608,7 @@ void cpuset_print_task_mems_allowed(struct task_struct *tsk) tsk->comm, cgroup_name(cgrp), cpuset_nodelist); spin_unlock(&cpuset_buffer_lock); + rcu_read_unlock(); } /* -- 1.8.0.2 -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
