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Date: Mon, 18 Aug 2008 14:04:55 +0300
From: Denys Fedoryshchenko <denys@...p.net.lb>
To: Jarek Poplawski <jarkao2@...il.com>
Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH]: Schedule correct qdisc in watchdog.
Just to update. Current net-2.6 with [PATCH]: Schedule correct qdisc in watchdog. , for now only following warning appearing
[ 177.061416]
[ 177.061416] =============================================
[ 177.061416] [ INFO: possible recursive locking detected ]
[ 177.061416] 2.6.27-rc3-build-0031-12578-g96d2031-dirty #25
[ 177.061416] ---------------------------------------------
[ 177.061416] swapper/0 is trying to acquire lock:
[ 177.061416] (&list->lock#2){-+..}, at: [<c026191e>] dev_queue_xmit+0x31c/0x4a0
[ 177.061416]
[ 177.061416] but task is already holding lock:
[ 177.061416] (&list->lock#2){-+..}, at: [<c0260e5d>] netif_receive_skb+0x271/0x400
[ 177.061416]
[ 177.061416] other info that might help us debug this:
[ 177.061416] 5 locks held by swapper/0:
[ 177.061416] #0: (rcu_read_lock){..--}, at: [<c025f97b>] net_rx_action+0x54/0x1e5
[ 177.061416] #1: (rcu_read_lock){..--}, at: [<c0260cf8>] netif_receive_skb+0x10c/0x400
[ 177.061416] #2: (&list->lock#2){-+..}, at: [<c0260e5d>] netif_receive_skb+0x271/0x400
[ 177.061416] #3: (&p->tcfc_lock){-+..}, at: [<e0a1b303>] tcf_mirred+0x1f/0x14c [act_mirred]
[ 177.061416] #4: (rcu_read_lock){..--}, at: [<c0261782>] dev_queue_xmit+0x180/0x4a0
[ 177.061416]
[ 177.061416] stack backtrace:
[ 177.061416] Pid: 0, comm: swapper Not tainted 2.6.27-rc3-build-0031-12578-g96d2031-dirty #25
[ 177.061416] [<c02ba6cf>] ? printk+0xf/0x18
[ 177.061416] [<c013ed12>] __lock_acquire+0xb3a/0x118a
[ 177.061416] [<c013f3aa>] lock_acquire+0x48/0x64
[ 177.061416] [<c026191e>] ? dev_queue_xmit+0x31c/0x4a0
[ 177.061416] [<c02bcba1>] _spin_lock+0x1b/0x2a
[ 177.061416] [<c026191e>] ? dev_queue_xmit+0x31c/0x4a0
[ 177.061416] [<c026191e>] dev_queue_xmit+0x31c/0x4a0
[ 177.061416] [<e0a1b40f>] tcf_mirred+0x12b/0x14c [act_mirred]
[ 177.061416] [<e0a1b2e4>] ? tcf_mirred+0x0/0x14c [act_mirred]
[ 177.061416] [<c02711bb>] tcf_action_exec+0x43/0x72
[ 177.061416] [<e0a4dcd5>] u32_classify+0xf4/0x20b [cls_u32]
[ 177.061416] [<c013dabf>] ? trace_hardirqs_on+0xb/0xd
[ 177.061416] [<c026ebb9>] tc_classify_compat+0x2e/0x5d
[ 177.061416] [<c026ed01>] tc_classify+0x17/0x72
[ 177.061416] [<e0a530b2>] ingress_enqueue+0x1a/0x54 [sch_ingress]
[ 177.061416] [<c0260e7d>] netif_receive_skb+0x291/0x400
[ 177.061416] [<c013dabf>] ? trace_hardirqs_on+0xb/0xd
[ 177.061416] [<c0261060>] process_backlog+0x74/0xcb
[ 177.061416] [<c025f9e2>] net_rx_action+0xbb/0x1e5
[ 177.061416] [<c0126203>] __do_softirq+0x7b/0xf4
[ 177.061416] [<c0126188>] ? __do_softirq+0x0/0xf4
[ 177.061416] [<c01060b3>] do_softirq+0x65/0xb6
[ 177.061416] [<c014a35d>] ? handle_fasteoi_irq+0x0/0xb6
[ 177.061416] [<c0125e28>] irq_exit+0x44/0x79
[ 177.061416] [<c0106038>] do_IRQ+0xae/0xc4
[ 177.061416] [<c0104288>] common_interrupt+0x28/0x30
[ 177.061416] [<c013007b>] ? find_get_pid+0x2e/0x4d
[ 177.061416] [<c0108dc6>] ? default_idle+0x32/0x51
[ 177.061416] [<c01029ee>] cpu_idle+0xbf/0xe1
[ 177.061416] [<c02afefa>] rest_init+0x4e/0x50
[ 177.061416] =======================
On Monday 18 August 2008, Jarek Poplawski wrote:
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