diff options
| author | dingtianhong <dingtianhong@huawei.com> | 2013-07-10 04:04:02 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-07-11 01:44:03 (GMT) |
| commit | 440d57bc5ff55ec1efb3efc9cbe9420b4bbdfefa (patch) | |
| tree | bca8e4e5b4bcf8240127e532375b83d17c9491e4 | |
| parent | 45dd95c443c2d81d8d41e55afeafd4c61042fa76 (diff) | |
| download | linux-fsl-qoriq-440d57bc5ff55ec1efb3efc9cbe9420b4bbdfefa.tar.xz | |
ifb: fix rcu_sched self-detected stalls
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>
| -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 dc9f6a4..a11f7a4 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -292,8 +292,10 @@ 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(); |