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Date:	Wed, 03 Oct 2007 16:59:35 +0200
From:	Cedric Le Goater <clg@...ibm.com>
To:	Cedric Le Goater <legoater@...e.fr>
CC:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>,
	David Miller <davem@...emloft.net>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-2.6.24 0/3]: More TCP fixes

Cedric Le Goater wrote:
> Ilpo Järvinen wrote:
>> On Wed, 3 Oct 2007, Cedric Le Goater wrote:
>>
>>> Ilpo Järvinen wrote:
>>>> Ah, that's path 1) then... Since you seem to have enough time, I would say 
>>>> that the path 1 is good as well and bugs unrelated to the fix will show up 
>>>> there too...
>>> arg. yes. sorry for the confusion.
>>>
>>>> I should have stated it explicitly that with path 2 those 3 patches should 
>>>> not be applied because the aim is not a fix but reproducal. Path 2 was 
>>>> intentionally left without the potentional fix as then nice backtrace 
>>>> informs when we can stop trying (which would hopefully occurred 
>>>> pretty soon) :-).  But lets discard that path 2...
>>> I have 2 spare nodes so i'll run both. 1) is on already without any issues
>>> i'm just compiling 2)
> 
> Below are the messages I got on 2) right after running ketchup (which does 
> a wget www.kernel.org) 

and a second run of ketchup gave the following.

cheers,

C.

WARNING: at /home/legoater/linux/2.6.23-rc8-mm2-tcp_fastretrans/net/ipv4/tcp_ipv4.c:193 tcp_verify_fackets()

Call Trace:
 <IRQ>  [<ffffffff8041aa86>] tcp_verify_fackets+0x119/0x237
 [<ffffffff80416e57>] tcp_fragment+0x468/0x4b8
 [<ffffffff804184a5>] tcp_retransmit_skb+0xcf/0x2f4
 [<ffffffff8041878d>] tcp_xmit_retransmit_queue+0xc3/0x31e
 [<ffffffff8041220a>] tcp_fastretrans_alert+0xb36/0xb43
 [<ffffffff80412f0f>] tcp_ack+0x5d3/0x71b
 [<ffffffff80415229>] tcp_rcv_established+0x61f/0x6df
 [<ffffffff8025419a>] __lock_acquire+0x8a1/0xf1b
 [<ffffffff8041c7ff>] tcp_v4_do_rcv+0x3e/0x394
 [<ffffffff8041d171>] tcp_v4_rcv+0x61c/0x9a9
 [<ffffffff804017e3>] ip_local_deliver+0x1da/0x2a4
 [<ffffffff8040214e>] ip_rcv+0x583/0x5c9
 [<ffffffff8046fe43>] packet_rcv_spkt+0x19a/0x1a8
 [<ffffffff803e2e1c>] netif_receive_skb+0x2cf/0x2f5
 [<ffffffff88042505>] :tg3:tg3_poll+0x65d/0x8a4
 [<ffffffff803e2fe8>] net_rx_action+0xb8/0x191
 [<ffffffff8023a9b7>] __do_softirq+0x5f/0xe0
 [<ffffffff8020c98c>] call_softirq+0x1c/0x28
 [<ffffffff8020e9c3>] do_softirq+0x3b/0xb8
 [<ffffffff8023aaae>] irq_exit+0x4e/0x50
 [<ffffffff8020e7df>] do_IRQ+0xbd/0xd7
 [<ffffffff80209cb9>] mwait_idle+0x0/0x4d
 [<ffffffff8020bce6>] ret_from_intr+0x0/0xf
 <EOI>  [<ffffffff80209cfc>] mwait_idle+0x43/0x4d
 [<ffffffff802099fb>] enter_idle+0x22/0x24
 [<ffffffff80209c4f>] cpu_idle+0x9d/0xc0
 [<ffffffff80479591>] rest_init+0x55/0x57
 [<ffffffff8063681f>] start_kernel+0x2e0/0x2ec
 [<ffffffff80636134>] _sinittext+0x134/0x13b

TCP wq(s) --S------<
TCP wq(i)   h      <
s1 f5 (14) p6 seq: su110259658 hs110265450 sn110278722 (0)
WARNING: at /home/legoater/linux/2.6.23-rc8-mm2-tcp_fastretrans/net/ipv4/tcp_ipv4.c:193 tcp_verify_fackets()

Call Trace:
 <IRQ>  [<ffffffff803250aa>] vgacon_scroll+0x188/0x1dd
 [<ffffffff8041aa86>] tcp_verify_fackets+0x119/0x237
 [<ffffffff80416e57>] tcp_fragment+0x468/0x4b8
 [<ffffffff804184a5>] tcp_retransmit_skb+0xcf/0x2f4
 [<ffffffff8041878d>] tcp_xmit_retransmit_queue+0xc3/0x31e
 [<ffffffff8041220a>] tcp_fastretrans_alert+0xb36/0xb43
 [<ffffffff80412f0f>] tcp_ack+0x5d3/0x71b
 [<ffffffff80415229>] tcp_rcv_established+0x61f/0x6df
 [<ffffffff8025419a>] __lock_acquire+0x8a1/0xf1b
 [<ffffffff8041c7ff>] tcp_v4_do_rcv+0x3e/0x394
 [<ffffffff8041d171>] tcp_v4_rcv+0x61c/0x9a9
 [<ffffffff804017e3>] ip_local_deliver+0x1da/0x2a4
 [<ffffffff8040214e>] ip_rcv+0x583/0x5c9
 [<ffffffff8046fe43>] packet_rcv_spkt+0x19a/0x1a8
 [<ffffffff803e2e1c>] netif_receive_skb+0x2cf/0x2f5
 [<ffffffff88042505>] :tg3:tg3_poll+0x65d/0x8a4
 [<ffffffff803e2fe8>] net_rx_action+0xb8/0x191
 [<ffffffff8023a9b7>] __do_softirq+0x5f/0xe0
 [<ffffffff8020c98c>] call_softirq+0x1c/0x28
 [<ffffffff8020e9c3>] do_softirq+0x3b/0xb8
 [<ffffffff8023aaae>] irq_exit+0x4e/0x50
 [<ffffffff8020e7df>] do_IRQ+0xbd/0xd7
 [<ffffffff80209cb9>] mwait_idle+0x0/0x4d
 [<ffffffff8020bce6>] ret_from_intr+0x0/0xf
 <EOI>  [<ffffffff80209cfc>] mwait_idle+0x43/0x4d
 [<ffffffff802099fb>] enter_idle+0x22/0x24
 [<ffffffff80209c4f>] cpu_idle+0x9d/0xc0
 [<ffffffff80479591>] rest_init+0x55/0x57
 [<ffffffff8063681f>] start_kernel+0x2e0/0x2ec
 [<ffffffff80636134>] _sinittext+0x134/0x13b

WARNING: at /home/legoater/linux/2.6.23-rc8-mm2-tcp_fastretrans/net/ipv4/tcp_ipv4.c:198 tcp_verify_fackets()

Call Trace:
 <IRQ>  [<ffffffff803250aa>] vgacon_scroll+0x188/0x1dd
 [<ffffffff8041aad0>] tcp_verify_fackets+0x163/0x237
 [<ffffffff80416e57>] tcp_fragment+0x468/0x4b8
 [<ffffffff804184a5>] tcp_retransmit_skb+0xcf/0x2f4
 [<ffffffff8041878d>] tcp_xmit_retransmit_queue+0xc3/0x31e
 [<ffffffff8041220a>] tcp_fastretrans_alert+0xb36/0xb43
 [<ffffffff80412f0f>] tcp_ack+0x5d3/0x71b
 [<ffffffff80415229>] tcp_rcv_established+0x61f/0x6df
 [<ffffffff8025419a>] __lock_acquire+0x8a1/0xf1b
 [<ffffffff8041c7ff>] tcp_v4_do_rcv+0x3e/0x394
 [<ffffffff8041d171>] tcp_v4_rcv+0x61c/0x9a9
 [<ffffffff804017e3>] ip_local_deliver+0x1da/0x2a4
 [<ffffffff8040214e>] ip_rcv+0x583/0x5c9
 [<ffffffff8046fe43>] packet_rcv_spkt+0x19a/0x1a8
 [<ffffffff803e2e1c>] netif_receive_skb+0x2cf/0x2f5
 [<ffffffff88042505>] :tg3:tg3_poll+0x65d/0x8a4
 [<ffffffff803e2fe8>] net_rx_action+0xb8/0x191
 [<ffffffff8023a9b7>] __do_softirq+0x5f/0xe0
 [<ffffffff8020c98c>] call_softirq+0x1c/0x28
 [<ffffffff8020e9c3>] do_softirq+0x3b/0xb8
 [<ffffffff8023aaae>] irq_exit+0x4e/0x50
 [<ffffffff8020e7df>] do_IRQ+0xbd/0xd7
 [<ffffffff80209cb9>] mwait_idle+0x0/0x4d
 [<ffffffff8020bce6>] ret_from_intr+0x0/0xf
 <EOI>  [<ffffffff80209cfc>] mwait_idle+0x43/0x4d
 [<ffffffff802099fb>] enter_idle+0x22/0x24
 [<ffffffff80209c4f>] cpu_idle+0x9d/0xc0
 [<ffffffff80479591>] rest_init+0x55/0x57
 [<ffffffff8063681f>] start_kernel+0x2e0/0x2ec
 [<ffffffff80636134>] _sinittext+0x134/0x13b

TCP wq(s) ---SSS-----<
TCP wq(i)      hf    <
s3 f7 (14) p7 seq: su110259658 hs110268346 sn110278722 (110269794)




C.
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