On 13 January 2016 at 16:42, Pravin B Shelar <pshe...@nicira.com> wrote:
> nf-hook is not unregistered on STT device delete, But when
> second time it was created it nf-hook is again registered.
> which causes following softlockup.
> Following patch fixes it by registering nf-hook only on very
> first stt device.
>
> ---8<---
>
> BUG: soft lockup - CPU#1 stuck for 22s! [ovs-vswitchd:11293]
> RIP: 0010:[<ffffffffa0e48308>] [<ffffffffa0e48308>] nf_ip_hook+0xf8/0x180
> [openvswitch]
> Stack:
> <IRQ>
> [<ffffffff8163bf60>] ? ip_rcv_finish+0x350/0x350
> [<ffffffff8163572a>] nf_iterate+0x9a/0xb0
> [<ffffffff8163bf60>] ? ip_rcv_finish+0x350/0x350
> [<ffffffff816357bc>] nf_hook_slow+0x7c/0x120
> [<ffffffff8163bf60>] ? ip_rcv_finish+0x350/0x350
> [<ffffffff8163c343>] ip_local_deliver+0x73/0x80
> [<ffffffff8163bc8d>] ip_rcv_finish+0x7d/0x350
> [<ffffffff8163c5e8>] ip_rcv+0x298/0x3d0
> [<ffffffff81605f26>] __netif_receive_skb_core+0x696/0x880
> [<ffffffff81606128>] __netif_receive_skb+0x18/0x60
> [<ffffffff81606cce>] process_backlog+0xae/0x180
> [<ffffffff81606512>] net_rx_action+0x152/0x270
> [<ffffffff8106accc>] __do_softirq+0xec/0x300
> [<ffffffff81710a1c>] do_softirq_own_stack+0x1c/0x30
>
> Fixes: fee43fa2 ("datapath: Fix deadlock on STT device destroy.")
> Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
Seems to be working well.
Tested-by: Joe Stringer <j...@ovn.org>
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