3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <eduma...@google.com>
[ Upstream commit 16b0dc29c1af9df341428f4c49ada4f626258082 ]
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: Eric Dumazet <eduma...@google.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/net/dummy.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index eeac9ca..87e4632 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -186,8 +186,10 @@ 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();
--
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