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authordingtianhong <dingtianhong@huawei.com>2013-07-10 08:04:02 +0400
committerDavid S. Miller <davem@davemloft.net>2013-07-11 05:44:03 +0400
commit440d57bc5ff55ec1efb3efc9cbe9420b4bbdfefa (patch)
treebca8e4e5b4bcf8240127e532375b83d17c9491e4 /drivers/net/ifb.c
parent45dd95c443c2d81d8d41e55afeafd4c61042fa76 (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/net/ifb.c')
-rw-r--r--drivers/net/ifb.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index dc9f6a45515d..a11f7a45cb5f 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();