Jarek Poplawski a71fb88145 bonding: Fix lockdep warning after bond_vlan_rx_register() ... Fix lockdep warning: [ 52.991402] ====================================================== [ 52.991511] [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ] [ 52.991569] 2.6.36-04573-g4b60626-dirty #65 [ 52.991622] ------------------------------------------------------ [ 52.991696] ip/4842 [HC0[0]:SC0[4]:HE1:SE0] is trying to acquire: [ 52.991758] (&bond->lock){++++..}, at: [<efe4d300>] bond_set_multicast_list+0x60/0x2c0 [bonding] [ 52.991966] [ 52.991967] and this task is already holding: [ 52.992008] (&bonding_netdev_addr_lock_key){+.....}, at: [<c04e5530>] dev_mc_sync+0x50/0xa0 [ 52.992008] which would create a new lock dependency: [ 52.992008] (&bonding_netdev_addr_lock_key){+.....} -> (&bond->lock){++++..} [ 52.992008] [ 52.992008] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 52.992008] (&(&mc->mca_lock)->rlock){+.-...} [ 52.992008] ... which became SOFTIRQ-irq-safe at: [ 52.992008] [<c0272beb>] __lock_acquire+0x96b/0x1960 [ 52.992008] [<c027415e>] lock_acquire+0x7e/0xf0 [ 52.992008] [<c05f356d>] _raw_spin_lock_bh+0x3d/0x50 [ 52.992008] [<c0584e40>] mld_ifc_timer_expire+0xf0/0x280 [ 52.992008] [<c024cee6>] run_timer_softirq+0x146/0x310 [ 52.992008] [<c024591d>] __do_softirq+0xad/0x1c0 [ 52.992008] [ 52.992008] to a SOFTIRQ-irq-unsafe lock: [ 52.992008] (&bond->lock){++++..} [ 52.992008] ... which became SOFTIRQ-irq-unsafe at: [ 52.992008] ... [<c0272c3b>] __lock_acquire+0x9bb/0x1960 [ 52.992008] [<c027415e>] lock_acquire+0x7e/0xf0 [ 52.992008] [<c05f36b8>] _raw_write_lock+0x38/0x50 [ 52.992008] [<efe4cbe4>] bond_vlan_rx_register+0x24/0x70 [bonding] [ 52.992008] [<c0598010>] register_vlan_dev+0xc0/0x280 [ 52.992008] [<c0599f3a>] vlan_newlink+0xaa/0xd0 [ 52.992008] [<c04ed4b4>] rtnl_newlink+0x404/0x490 [ 52.992008] [<c04ece35>] rtnetlink_rcv_msg+0x1e5/0x220 [ 52.992008] [<c050424e>] netlink_rcv_skb+0x8e/0xb0 [ 52.992008] [<c04ecbac>] rtnetlink_rcv+0x1c/0x30 [ 52.992008] [<c0503bfb>] netlink_unicast+0x24b/0x290 [ 52.992008] [<c0503e37>] netlink_sendmsg+0x1f7/0x310 [ 52.992008] [<c04cd41c>] sock_sendmsg+0xac/0xe0 [ 52.992008] [<c04ceb80>] sys_sendmsg+0x130/0x230 [ 52.992008] [<c04cf04e>] sys_socketcall+0xde/0x280 [ 52.992008] [<c0202d10>] sysenter_do_call+0x12/0x36 [ 52.992008] [ 52.992008] other info that might help us debug this: ... [ Full info at netdev: Wed, 27 Oct 2010 12:24:30 +0200 Subject: [BUG net-2.6 vlan/bonding] lockdep splats ] Use BH variant of write_lock(&bond->lock) (as elsewhere in bond_main) to prevent this dependency. Fixes commit f35188faa0 [v2.6.36] Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jay Vosburgh <fubar@us.ibm.com>		2010-10-27 14:24:07 -07:00
..
Makefile	bonding: send IPv6 neighbor advertisement on failover	2008-11-06 00:49:37 -05:00
bond_3ad.c	bonding: cleanup: remove braces from single block statements	2010-10-21 03:09:49 -07:00
bond_3ad.h	Remove duplicate slow protocol define in bond_3ad.h	2009-05-09 13:15:49 -07:00
bond_alb.c	bonding: correctly process non-linear skbs	2010-09-14 14:25:32 -07:00
bond_alb.h	Convert bonding timers to workqueues	2007-10-23 20:32:00 -04:00
bond_ipv6.c	bonding: fix bond_inet6addr_event()	2010-07-19 09:34:31 -07:00
bond_main.c	bonding: Fix lockdep warning after bond_vlan_rx_register()	2010-10-27 14:24:07 -07:00
bond_sysfs.c	bonding: Fix deadlock in bonding driver resulting from internal locking when using netpoll	2010-10-18 08:32:07 -07:00
bonding.h	bonding: make release_and_destroy static	2010-10-21 03:09:46 -07:00