2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------ From: dingtianhong <[email protected]> [ 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 <[email protected]> Signed-off-by: David S. Miller <[email protected]> [wt: 2.6.32: cond_resched() needs linux/sched.h] Signed-off-by: Willy Tarreau <[email protected]> --- drivers/net/ifb.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index 030913f..cfd5510 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> @@ -269,8 +270,10 @@ 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(); -- 1.7.12.2.21.g234cd45.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
