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Date: Thu, 14 Aug 2008 18:10:26 +0300
From: Denys Fedoryshchenko <denys@...p.net.lb>
To: Jarek Poplawski <jarkao2@...il.com>
Cc: netdev@...r.kernel.org
Subject: New: softlockup in 2.6.27-rc3-git2
Sorry, i had to update subject
On Thursday 14 August 2008, Denys Fedoryshchenko wrote:
> On 2.6.27 rc3-git2 i am getting softlockup after 60-120 seconds after
> running. Netconsole is almost dead, i tried to use it get stacktrace, but
> it is sending few lines of header only.
>
> It happens when many tc sessions running in parallel, thats only info i
> have now.
>
> Update: got interesting info, maybe this is the issue:
>
>
> Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> ============================================= Aug 14 18:07:09
> 194.146.153.146 [ 41.496997] [ INFO: possible recursive locking detected
> ] Aug 14 18:07:09 194.146.153.146 [ 41.496997] 2.6.27-rc3-git2-build-0030
> #5 Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> --------------------------------------------- Aug 14 18:07:09
> 194.146.153.146 [ 41.496997] swapper/0 is trying to acquire lock: Aug 14
> 18:07:09 194.146.153.146 [ 41.496997] (&list->lock
> Aug 14 18:07:09 194.146.153.146 #2
> Aug 14 18:07:09 194.146.153.146 ){-+..}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c02617d4>] dev_queue_xmit+0x31f/0x481
> Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] but task is already holding
> lock: Aug 14 18:07:09 194.146.153.146 [ 41.496997] (&list->lock
> Aug 14 18:07:09 194.146.153.146 #2
> Aug 14 18:07:09 194.146.153.146 ){-+..}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c0260d17>] netif_receive_skb+0x26e/0x3f6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] other info that might help
> us debug this: Aug 14 18:07:09 194.146.153.146 [ 41.496997] 5 locks held
> by swapper/0: Aug 14 18:07:09 194.146.153.146 [ 41.496997] #0:
> Aug 14 18:07:09 194.146.153.146 (rcu_read_lock
> Aug 14 18:07:09 194.146.153.146 ){..--}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c025f873>] net_rx_action+0x54/0x1e5
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] #1:
> Aug 14 18:07:09 194.146.153.146 (rcu_read_lock
> Aug 14 18:07:09 194.146.153.146 ){..--}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c0260bb5>] netif_receive_skb+0x10c/0x3f6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] #2:
> Aug 14 18:07:09 194.146.153.146 (&list->lock
> Aug 14 18:07:09 194.146.153.146 #2
> Aug 14 18:07:09 194.146.153.146 ){-+..}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c0260d17>] netif_receive_skb+0x26e/0x3f6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] #3:
> Aug 14 18:07:09 194.146.153.146 (&p->tcfc_lock
> Aug 14 18:07:09 194.146.153.146 ){-+..}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<f8a602fc>] tcf_mirred+0x1f/0x14b
> [act_mirred] Aug 14 18:07:09 194.146.153.146 [ 41.496997] #4:
> Aug 14 18:07:09 194.146.153.146 (rcu_read_lock
> Aug 14 18:07:09 194.146.153.146 ){..--}
> Aug 14 18:07:09 194.146.153.146 , at:
> Aug 14 18:07:09 194.146.153.146 [<c0261635>] dev_queue_xmit+0x180/0x481
> Aug 14 18:07:09 194.146.153.146 [ 41.496997]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] stack backtrace:
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] Pid: 0, comm: swapper Not
> tainted 2.6.27-rc3-git2-build-0030 #5 Aug 14 18:07:09 194.146.153.146 [
> 41.496997] [<c02ba433>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 printk+0xf/0x14
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c013ed12>]
> Aug 14 18:07:09 194.146.153.146 __lock_acquire+0xb3a/0x118a
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c013f3aa>]
> Aug 14 18:07:09 194.146.153.146 lock_acquire+0x48/0x64
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c02617d4>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 dev_queue_xmit+0x31f/0x481
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c02bc901>]
> Aug 14 18:07:09 194.146.153.146 _spin_lock+0x1b/0x2a
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c02617d4>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 dev_queue_xmit+0x31f/0x481
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c02617d4>]
> Aug 14 18:07:09 194.146.153.146 dev_queue_xmit+0x31f/0x481
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<f8a60408>]
> Aug 14 18:07:09 194.146.153.146 tcf_mirred+0x12b/0x14b [act_mirred]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<f8a602dd>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 tcf_mirred+0x0/0x14b [act_mirred]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c027102b>]
> Aug 14 18:07:09 194.146.153.146 tcf_action_exec+0x43/0x72
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<f8a92cd5>]
> Aug 14 18:07:09 194.146.153.146 u32_classify+0xf4/0x20b [cls_u32]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c013dabf>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 trace_hardirqs_on+0xb/0xd
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c026ea85>]
> Aug 14 18:07:09 194.146.153.146 tc_classify_compat+0x2e/0x5d
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c026ebcd>]
> Aug 14 18:07:09 194.146.153.146 tc_classify+0x17/0x72
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<f8a9c0b2>]
> Aug 14 18:07:09 194.146.153.146 ingress_enqueue+0x1a/0x54 [sch_ingress]
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0260d31>]
> Aug 14 18:07:09 194.146.153.146 netif_receive_skb+0x288/0x3f6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0260f13>]
> Aug 14 18:07:09 194.146.153.146 process_backlog+0x74/0xcb
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c025f8da>]
> Aug 14 18:07:09 194.146.153.146 net_rx_action+0xbb/0x1e5
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0126203>]
> Aug 14 18:07:09 194.146.153.146 __do_softirq+0x7b/0xf4
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0126188>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 __do_softirq+0x0/0xf4
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c01060b3>]
> Aug 14 18:07:09 194.146.153.146 do_softirq+0x65/0xb6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c014a35d>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 handle_fasteoi_irq+0x0/0xb6
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0125e28>]
> Aug 14 18:07:09 194.146.153.146 irq_exit+0x44/0x79
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0106038>]
> Aug 14 18:07:09 194.146.153.146 do_IRQ+0xae/0xc4
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0104288>]
> Aug 14 18:07:09 194.146.153.146 common_interrupt+0x28/0x30
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c013007b>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 find_get_pid+0x2e/0x4d
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c0108d8a>]
> Aug 14 18:07:09 194.146.153.146 ?
> Aug 14 18:07:09 194.146.153.146 mwait_idle+0x39/0x43
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c01029ee>]
> Aug 14 18:07:09 194.146.153.146 cpu_idle+0xbf/0xe1
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] [<c02afc5e>]
> Aug 14 18:07:09 194.146.153.146 rest_init+0x4e/0x50
> Aug 14 18:07:09 194.146.153.146 [ 41.496997] =======================
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