saw a debug splat:
net/include/net/sch_generic.h:287 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
2 locks held by kworker/2:1/710:
#0: ("events"){.+.+.+}, at: [<ffffffff8106ca1d>]
#1: ((&q->work)){+.+...}, at: [<ffffffff8106ca1d>]
process_one_work+0x14d/0x690
Workqueue: events htb_work_func
Call Trace:
[<ffffffff812dc763>] dump_stack+0x85/0xc2
[<ffffffff8109fee7>] lockdep_rcu_suspicious+0xe7/0x120
[<ffffffff814ced47>] htb_work_func+0x67/0x70
Signed-off-by: Florian Westphal <f...@strlen.de>
---
net/sched/sch_htb.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index d4b4218..62f9d81 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1007,7 +1007,9 @@ static void htb_work_func(struct work_struct *work)
struct htb_sched *q = container_of(work, struct htb_sched, work);
struct Qdisc *sch = q->watchdog.qdisc;
+ rcu_read_lock();
__netif_schedule(qdisc_root(sch));
+ rcu_read_unlock();
}
static int htb_init(struct Qdisc *sch, struct nlattr *opt)
--
2.7.3
