diff options
| author | dingtianhong <dingtianhong@huawei.com> | 2013-07-10 12:04:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-28 16:26:04 -0700 |
| commit | f4a9457edcc8dc2c09b9fe5c0cd4cb8381d9205a (patch) | |
| tree | 89f146906afa956dd145b7b08f0fc0993a157cdf | |
| parent | e830fa9ba4bc3f29bed4c6b99ba6db1f2caf7252 (diff) | |
ifb: fix rcu_sched self-detected stalls
[ Upstream commit 440d57bc5ff55ec1efb3efc9cbe9420b4bbdfefa ]
According to the commit 16b0dc29c1af9df341428f4c49ada4f626258082
(dummy: fix rcu_sched self-detected stalls)
Eric Dumazet fix the problem in dummy, but the ifb will occur the
same problem like the dummy modules.
Trying to "modprobe ifb numifbs=30000" triggers :
INFO: rcu_sched self-detected stall on CPU
After this splat, RTNL is locked and reboot is needed.
We must call cond_resched() to avoid this, even holding RTNL.
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ifb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index 344dceb1aaf9..04ab337ce7aa 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -291,8 +291,10 @@ static int __init ifb_init_module(void) rtnl_lock(); err = __rtnl_link_register(&ifb_link_ops); - for (i = 0; i < numifbs && !err; i++) + for (i = 0; i < numifbs && !err; i++) { err = ifb_init_one(i); + cond_resched(); + } if (err) __rtnl_link_unregister(&ifb_link_ops); rtnl_unlock(); |