[Click] dev_queue_xmit vs. hard_start_xmit

Tue Jan 11 03:21:32 EST 2011

 Hi Roman,

To me looks like the module myri10ge is crashing. What is strange is that running click in user mode everything runs smoothly.
As I told you in my previous e-mail, using dev_queue_xmit kernel module runs smoothly, too (not only for myricom NIC but intel 1Gb ethernet NIC).

Thanks for your time,

Ricard

Jan 7 11:18:29 strongest-2 kernel: [160300.209737] click: starting router thread pid 21038 (f3d20180)
Jan 7 11:20:52 strongest-2 kernel: [160443.541141] BUG: unable to handle kernel NULL pointer dereference at (null)
Jan 7 11:20:52 strongest-2 kernel: [160443.541229] IP: [<f846aba4>] myri10ge_xmit+0x455/0x9c3 [myri10ge]
Jan 7 11:20:52 strongest-2 kernel: [160443.541284] *pde = 00000000
Jan 7 11:20:52 strongest-2 kernel: [160443.541325] Oops: 0002 [#1] SMP
Jan 7 11:20:52 strongest-2 kernel: [160443.541369] last sysfs file: /sys/module/vt/parameters/default_utf8
Jan 7 11:20:52 strongest-2 kernel: [160443.541420] Modules linked in: click proclikefs 8021q garp stp loop snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd i2c_i801 soundcore snd_page_alloc i2c_core ioatdma button myri10ge inet_lro evdev pcspkr processor ext3 jbd mbcache sg sr_mod sd_mod cdrom crc_t10dif ata_generic ata_piix libata scsi_mod uhci_hcd e1000e ehci_hcd usbcore nls_base igb dca thermal thermal_sys [last unloaded: scsi_wait_scan]
Jan 7 11:20:52 strongest-2 kernel: [160443.541834] Pid: 21038, comm: kclick Not tainted (2.6.32-5-686 #1) System Product Name
Jan 7 11:20:52 strongest-2 kernel: [160443.541917] EIP: 0060:[<f846aba4>] EFLAGS: 00010246 CPU: 0
Jan 7 11:20:52 strongest-2 kernel: [160443.541967] EIP is at myri10ge_xmit+0x455/0x9c3 [myri10ge]
Jan 7 11:20:52 strongest-2 kernel: [160443.542015] EAX: 00000000 EBX: 00000000 ECX: 0000040a EDX: f6338800
Jan 7 11:20:52 strongest-2 kernel: [160443.542066] ESI: 00000000 EDI: f50b9080 EBP: f63383e0 ESP: f671de9c
Jan 7 11:20:52 strongest-2 kernel: [160443.542117] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jan 7 11:20:52 strongest-2 kernel: [160443.542166] Process kclick (pid: 21038, ti=f671c000 task=f5c24840 task.ti=f671c000)
Jan 7 11:20:52 strongest-2 kernel: [160443.542247] Stack:
Jan 7 11:20:52 strongest-2 kernel: [160443.542282] 00000000 00000000 00000000 00000000 f5d6b800 00000000 f5d6bba0 00000000
Jan 7 11:20:52 strongest-2 kernel: [160443.542349] <0> f5d6c040 c1386ba0 0000040a 00000000 00000000 09cc77ff 00000000 00000000
Jan 7 11:20:52 strongest-2 kernel: [160443.542447] <0> 00000000 00000000 0000000c 00008100 f5c20000 c1007569 00000286 0000000f
Jan 7 11:20:52 strongest-2 kernel: [160443.542574] Call Trace:
Jan 7 11:20:52 strongest-2 kernel: [160443.542615] [<c1007569>] ? sched_clock+0x5/0x7
Jan 7 11:20:52 strongest-2 kernel: [160443.542664] [<c126c876>] ? schedule+0x78f/0x7dc
Jan 7 11:20:52 strongest-2 kernel: [160443.542786] [<fa141a48>] ? _ZN8ToDevice12queue_packetEP6PacketP12netdev_queue+0xf8/0x1c0 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.542948] [<fa155bc5>] ? _ZN13FullNoteQueue4pushEiP6Packet+0x1a5/0x220 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543102] [<fa141bfd>] ? _ZN8ToDevice8run_taskEP4Task+0xed/0x290 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543225] [<fa13ebbf>] ? _ZN10FromDevice8run_taskEP4Task+0x7f/0x110 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543347] [<fa0f79d6>] ? _ZN12RouterThread6driverEv+0x1a6/0x4b0 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543433] [<fa0dbdcd>] ? click_lalloc+0x2d/0x60 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543511] [<fa0d3f50>] ? _ZN6VectorIPvE7reserveEi+0x90/0xb0 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543623] [<fa180f7a>] ? _ZL11click_schedPv+0xda/0x1a0 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543734] [<fa180ea0>] ? _ZL11click_schedPv+0x0/0x1a0 [click]
Jan 7 11:20:52 strongest-2 kernel: [160443.543786] [<c1003d47>] ? kernel_thread_helper+0x7/0x10
Jan 7 11:20:52 strongest-2 kernel: [160443.543833] Code: 00 00 00 c7 44 24 60 00 00 00 00 8b 5f 54 8b 4f 50 29 d9 89 4c 24 28 8b 55 20 8b 45 18 21 d0 89 44 24 2c 89 c6 8b 45 14 c1 e6 04 <89> 3c 30 8b 5c 24 18 31 c0 8b 97 ac 00 00 00 8b 8b a4 00 00 00
Jan 7 11:20:52 strongest-2 kernel: [160443.544100] EIP: [<f846aba4>] myri10ge_xmit+0x455/0x9c3 [myri10ge] SS:ESP 0068:f671de9c
Jan 7 11:20:52 strongest-2 kernel: [160443.544186] CR2: 0000000000000000
Jan 7 11:20:52 strongest-2 kernel: [160443.544714] ---[ end trace b519e64f26b52814 ]---

----------------original message-----------------
From: "Roman Chertov" rchertov at cs.ucsb.edu 
To: click at amsterdam.lcs.mit.edu, "Ricard Vilalta" ricard.vilalta at cttc.es 
Date: Mon, 10 Jan 2011 09:33:37 -0800
-------------------------------------------------

> Ricard,
> 
> Do you have the stack trace of the kernel panic?
> 
> Roman
> 
> On Mon, 10 Jan 2011 12:58:00 +0100 Ricard Vilalta ricard.vilalta at cttc.es 
> wrote
> 
>> Hi all,
>> I am not a linux kernel guru and I would like your support. I have
>> lately been working with Myricom NIC's (using linux kernel module
>> myri10ge) and it was impossible to forward paquets from another ethernet
>> interface to the myricom interface. This leaded to kernel panic. I have
>> been trying several solutions and the only one which seems to be working
>> is using dev_queue_xmit instead of hard_start_xmit on todevice. I am
>> using patchless click with linux kernel 2.6.32-35.
>> 
>> I have fully tested the change and seems to work for me. What do you
>> think of this change? May it lead to another type of errors or
>> unexpected behaviors?
>> 
>> Thanks in advance.
>> 
>> Best regards,
>> Ricard
>> 
>> --
>> ______________________________________________________________
>> 
>> Ricard Vilalta
>> Research Engineer
>> Optical Networking Area (ONA) http://wikiona.cttc.es/
>> CTTC - Centre Tecnològic de Telecomunicacions de Catalunya
>> Parc Mediterrani de la Tecnologia (PMT)
>> Av. Carl Friedrich Gauss 7,
>> 08860 Castelldefels (Barcelona), Spain
>> http://www.cttc.es/
>> Phone: +34 93 396 71 70 (ext. 2232). Fax: +34 93 645 29 01
>> E-mail: ricard.vilalta at cttc.es 
>> 
>> 
>> _______________________________________________
>> click mailing list
>> click at amsterdam.lcs.mit.edu 
>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
> 
> 

-- 