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| author | dingtianhong <dingtianhong@huawei.com> | 2013-07-10 12:04:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-28 16:18:41 -0700 |
| commit | 14dfbe18c960e9367a6a25f6d7933e293fae1d20 (patch) | |
| tree | a0806d190fc5f1fbd4f63ac6a5918d75acfe2c50 /drivers/net | |
| parent | 83e460923c7640fe6af1a1b386513dcc26fe7251 (diff) | |
| download | kernel_samsung_smdk4412-14dfbe18c960e9367a6a25f6d7933e293fae1d20.zip kernel_samsung_smdk4412-14dfbe18c960e9367a6a25f6d7933e293fae1d20.tar.gz kernel_samsung_smdk4412-14dfbe18c960e9367a6a25f6d7933e293fae1d20.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ifb.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index 2b98461..280f4a8 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -33,6 +33,7 @@ #include <linux/etherdevice.h> #include <linux/init.h> #include <linux/moduleparam.h> +#include <linux/sched.h> #include <net/pkt_sched.h> #include <net/net_namespace.h> @@ -252,8 +253,10 @@ 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(); |