netdev - Re: UDP/bnx2: inconsistent lock state (Re: linux-next: Tree for October 30)

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Date:	Thu, 30 Oct 2008 14:22:30 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Alexander Beregalov <a.beregalov@...il.com>
CC:	mchan@...adcom.com, linux-next@...r.kernel.org,
	Netdev <netdev@...r.kernel.org>
Subject: Re: UDP/bnx2: inconsistent lock state (Re: linux-next: Tree for October
 30)

Alexander Beregalov a écrit :
> 2008/10/30 Alexander Beregalov <a.beregalov@...il.com>:
>> bnx2 0000:03:00.0: irq 38 for MSI/MSI-X
>> bnx2: eth0: using MSI
>> bnx2: eth0 NIC Copper Link is Up, 1000 Mbps full duplex, receive &
>> transmit flow control ON
>>
>> [ INFO: inconsistent lock state ]
>> 2.6.28-rc2-next-20081030 #4
>> ---------------------------------
>> inconsistent {softirq-on-W} -> {in-softirq-W} usage.
>> swapper/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
>>  (&table->hash[i].lock){-+..}, at: [<ffffffff804ea8c5>]
>> __udp4_lib_rcv+0x2a5/0x640
>> {softirq-on-W} state was registered at:
>>  [<ffffffff80257ea0>] __lock_acquire+0x2fd/0xc72
>>  [<ffffffff8025889a>] lock_acquire+0x85/0xa9
>>  [<ffffffff80525527>] _spin_lock+0x3c/0x70
>>  [<ffffffff804eaca2>] udp_lib_unhash+0x2b/0x90
>>  [<ffffffff804ab315>] sk_common_release+0x2f/0x83
>>  [<ffffffff804e9631>] udp_lib_close+0x9/0xb
>>  [<ffffffff804f1274>] inet_release+0x58/0x5f
>>  [<ffffffff804a889e>] sock_release+0x20/0xc1
>>  [<ffffffff804a8973>] sock_close+0x34/0x3a
>>  [<ffffffff8029e8ee>] __fput+0xc5/0x164
>>  [<ffffffff8029e9a2>] fput+0x15/0x17
>>  [<ffffffff8029be90>] filp_close+0x67/0x72
>>  [<ffffffff8023864a>] put_files_struct+0x74/0xc8
>>  [<ffffffff802386e5>] exit_files+0x47/0x4f
>>  [<ffffffff80239f28>] do_exit+0x27a/0x8b7
>>  [<ffffffff8023a5e4>] do_group_exit+0x7f/0xaf
>>  [<ffffffff8023a626>] sys_exit_group+0x12/0x14
>>  [<ffffffff8020b6fb>] system_call_fastpath+0x16/0x1b
>>  [<ffffffffffffffff>] 0xffffffffffffffff
>> irq event stamp: 56806
>> hardirqs last  enabled at (56806): [<ffffffff8023bf15>]
>> _local_bh_enable_ip+0xba/0xe3
>> hardirqs last disabled at (56805): [<ffffffff8023beaf>]
>> _local_bh_enable_ip+0x54/0xe3
>> softirqs last  enabled at (56786): [<ffffffff8023c0ec>] __do_softirq+0xf8/0x104
>> softirqs last disabled at (56791): [<ffffffff8020cbac>] call_softirq+0x1c/0x28
>>
>> other info that might help us debug this:
>> no locks held by swapper/0.
>>
>> stack backtrace:
>> Pid: 0, comm: swapper Not tainted 2.6.28-rc2-next-20081030 #4
>> Call Trace:
>>  <IRQ>  [<ffffffff80256a9c>] valid_state+0x179/0x18c
>>  [<ffffffff80256fda>] mark_lock+0x14d/0x37a
>>  [<ffffffff80257e25>] __lock_acquire+0x282/0xc72
>>  [<ffffffff804c9a91>] ? rt_intern_hash+0x442/0x45c
>>  [<ffffffff8023bf47>] ? local_bh_enable_ip+0x9/0xb
>>  [<ffffffff8025889a>] lock_acquire+0x85/0xa9
>>  [<ffffffff804ea8c5>] ? __udp4_lib_rcv+0x2a5/0x640
>>  [<ffffffff80525527>] _spin_lock+0x3c/0x70
>>  [<ffffffff804ea8c5>] ? __udp4_lib_rcv+0x2a5/0x640
>>  [<ffffffff804ea8c5>] __udp4_lib_rcv+0x2a5/0x640
>>  [<ffffffff804eac75>] udp_rcv+0x15/0x17
>>  [<ffffffff804cc1ec>] ip_local_deliver+0xad/0x13d
>>  [<ffffffff804cc107>] ip_rcv+0x4b7/0x4ef
>>  [<ffffffff804b3efb>] netif_receive_skb+0x213/0x23a
>>  [<ffffffff8042fa7c>] bnx2_poll_work+0x92e/0xaa5
>>  [<ffffffff8024f935>] ? getnstimeofday+0x3a/0x96
>>  [<ffffffff8025011e>] ? do_settimeofday+0x7f/0x131
>>  [<ffffffff8025001e>] ? update_wall_time+0x38e/0x40f
>>  [<ffffffff80256ea9>] ? mark_lock+0x1c/0x37a
>>  [<ffffffff802694f4>] ? __rcu_read_lock+0xa0/0xaf
>>  [<ffffffff8042fe41>] bnx2_poll+0x128/0x20d
>>  [<ffffffff804b2935>] net_rx_action+0xd2/0x1f4
>>  [<ffffffff8023c064>] __do_softirq+0x70/0x104
>>  [<ffffffff8020cbac>] call_softirq+0x1c/0x28
>>  [<ffffffff8020e1d5>] do_softirq+0x39/0x8a
>>  [<ffffffff8023bc89>] irq_exit+0x45/0xa2
>>  [<ffffffff8020e4e6>] do_IRQ+0x16a/0x19c
>>  [<ffffffff8020bc8b>] ret_from_intr+0x0/0xf
>>  <EOI>  [<ffffffff80212d69>] ? mwait_idle+0x3e/0x48
>>  [<ffffffff80212d60>] ? mwait_idle+0x35/0x48
>>  [<ffffffff8020a8db>] ? cpu_idle+0x59/0xc2
>>  [<ffffffff8051feb4>] ? start_secondary+0x263/0x26b
>>
> 
> Similar issue on sparc/sunhme
> 
>

Yes, its a generic problem, I replied to your previous mail with a proper fix

Thank you

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