Thanks Stephen.

I haven't seen this yet but we will look in to it.

-Don

> -----Original Message-----
> From: Stephen Hemminger [mailto:[email protected]]
> Sent: Monday, June 17, 2013 9:44 PM
> To: Kirsher, Jeffrey T; Brandeburg, Jesse; Allan, Bruce W; Wyborny, Carolyn;
> Skidmore, Donald C; Rose, Gregory V; Waskiewicz Jr, Peter P; Duyck,
> Alexander H
> Cc: [email protected]
> Subject: ixgbe: log splat on shutdown
> 
> I am seeing this error on shutdown with 3.10 and net-next (on Debian 7.0)
> Looks like a problem with lockdep seeing issues with canceling work in ixgbe
> with rtnl held?
> 
> Not a bit issue, shutdown still works and no real big issue.
> 
> [  310.416382] INFO: trying to register non-static key.
> [  310.417499] the code is fine but needs lockdep annotation.
> [  310.418625] turning off the locking correctness validator.
> [  310.419769] CPU: 6 PID: 4592 Comm: ip Tainted: G        W    
> 3.10.0-rc6-net-
> next+ #2
> [  310.420930] Hardware name: System manufacturer System Product
> Name/P8Z77-V LX, BIOS 0801 07/17/2012 [  310.422108]  0000000000000002
> ffff88040c36d3f8 ffffffff81599da9 ffff88040c36d4f8 [  310.423333]
> ffffffff810ee889 0000000000000002 ffffffff81a37830 0000000000000000 [
> 310.424564]  0000000000000000 ffff880400000000 0000000000000046
> ffff88040c906dc0 [  310.425802] Call Trace:
> [  310.427017]  [<ffffffff81599da9>] dump_stack+0x19/0x1b [  310.428234]
> [<ffffffff810ee889>] __lock_acquire+0x17a9/0x1dd0 [  310.429447]
> [<ffffffff810efe1e>] ? mark_held_locks+0xae/0x120 [  310.430680]
> [<ffffffff815a0100>] ? _raw_spin_unlock_irq+0x30/0x50 [  310.431887]
> [<ffffffff810ef498>] lock_acquire+0x98/0x140 [  310.433103]
> [<ffffffff810b1f45>] ? flush_work+0x5/0x280 [  310.434304]
> [<ffffffff810b1f7d>] flush_work+0x3d/0x280 [  310.435490]
> [<ffffffff810b1f45>] ? flush_work+0x5/0x280 [  310.436668]
> [<ffffffff8159d04d>] ? __mutex_unlock_slowpath+0xdd/0x1a0
> [  310.437844]  [<ffffffff810efe1e>] ? mark_held_locks+0xae/0x120 [
> 310.439029]  [<ffffffff810b47f4>] ? __cancel_work_timer+0x74/0x120 [
> 310.440208]  [<ffffffff810effad>] ? trace_hardirqs_on_caller+0x11d/0x1e0
> [  310.441379]  [<ffffffff810b4807>] __cancel_work_timer+0x87/0x120 [
> 310.442561]  [<ffffffff810b48d0>] cancel_work_sync+0x10/0x20 [
> 310.443765]  [<ffffffffa005b50c>] ixgbe_ptp_stop+0x2c/0x90 [ixgbe] [
> 310.444977]  [<ffffffffa00448aa>] ixgbe_close+0x2a/0x100 [ixgbe] [
> 310.446225]  [<ffffffff81497fa5>] __dev_close_many+0x95/0xe0 [
> 310.447444]  [<ffffffff81498034>] __dev_close+0x44/0x90 [  310.448671]
> [<ffffffff8149fe61>] __dev_change_flags+0xa1/0x180 [  310.449866]
> [<ffffffff814a0008>] dev_change_flags+0x28/0x70 [  310.451068]
> [<ffffffff814ae411>] do_setlink+0x371/0x960 [  310.452269]
> [<ffffffff812fa011>] ? nla_parse+0x31/0xe0 [  310.453470]
> [<ffffffff814af0d9>] rtnl_newlink+0x369/0x580 [  310.454674]
> [<ffffffff814aebd4>] rtnetlink_rcv_msg+0xa4/0x240 [  310.455882]
> [<ffffffff8159ce6d>] ? mutex_lock_nested+0x2bd/0x3c0 [  310.457094]
> [<ffffffff814ab067>] ? rtnl_lock+0x17/0x20 [  310.458318]
> [<ffffffff814aeb30>] ? __rtnl_unlock+0x20/0x20 [  310.459519]
> [<ffffffff814cc1c1>] netlink_rcv_skb+0xb1/0xc0 [  310.460711]
> [<ffffffff814ab095>] rtnetlink_rcv+0x25/0x40 [  310.461905]
> [<ffffffff814cb75d>] netlink_unicast+0x10d/0x190 [  310.463106]
> [<ffffffff814cbaf1>] netlink_sendmsg+0x311/0x740 [  310.464327]
> [<ffffffff81484486>] sock_sendmsg+0xa6/0xd0 [  310.465514]
> [<ffffffff810eef50>] ? lock_release_non_nested+0xa0/0x310
> [  310.466704]  [<ffffffff8148483c>] ___sys_sendmsg+0x38c/0x3a0 [
> 310.467893]  [<ffffffff810bfda3>] ? up_read+0x23/0x40 [  310.469076]
> [<ffffffff81079754>] ? __do_page_fault+0x214/0x4b0 [  310.470278]
> [<ffffffff8118caf8>] ? do_brk+0x2b8/0x330 [  310.471454]
> [<ffffffff8118ca0b>] ? do_brk+0x1cb/0x330 [  310.472619]
> [<ffffffff81485a69>] __sys_sendmsg+0x49/0x90 [  310.473786]
> [<ffffffff81485ac2>] SyS_sendmsg+0x12/0x20 [  310.474961]
> [<ffffffff815a1359>] system_call_fastpath+0x16/0x1b

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