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.le...@oracle.com>
Signed-off-by: Li Zefan <lize...@huawei.com>
---
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
--
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