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Commit 16b0dc29 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

dummy: fix rcu_sched self-detected stalls 



Trying to "modprobe dummy numdummies=30000" triggers :

INFO: rcu_sched self-detected stall on CPU { 8} (t=60000 jiffies)

After this splat, RTNL is locked and reboot is needed.

We must call cond_resched() to avoid this, even holding RTNL.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c5d21c4b

drivers/net/dummy.c

+3 −1
Original line number Diff line number Diff line
@@ -187,8 +187,10 @@ static int __init dummy_init_module(void) 
	rtnl_lock();

	err = __rtnl_link_register(&dummy_link_ops);



	for (i = 0; i < numdummies && !err; i++)

	for (i = 0; i < numdummies && !err; i++) {

		err = dummy_init_one();

		cond_resched();

	}

	if (err < 0)

		__rtnl_link_unregister(&dummy_link_ops);

	rtnl_unlock();