Am trying to learn network drivers in linux.
I need help in understanding the following error and what various information we can get from that, so that I can identify the problem.
From the backtrace, it is clear that the e1000_watchdog is throwing the error.
This error I have seen on Centos 5.5 (kernel-2.6.18-194) and whenever am doing ifconfig up or ifconfig down, this is shown.
kernel BUG at kernel/workqueue.c:113!
invalid opcode: 0000 [#1]
SMP
last sysfs file: /class/net/eth1/address
Modules linked in: proclikefs(U) deflate(U) zlib_deflate(U) af_key(U) autofs4(U)
Âkick(U) dm_mirror(U) dm_log(U) dm_multipath(U) scsi_dh(U) dm_mod(U) parport_pc(
U) lp(U) parport(U) sg(U) snd_intel8x0(U) snd_ac97_codec(U) ac97_bus(U) snd_seq_
dummy(U) snd_seq_oss(U) snd_seq_midi_event(U) snd_seq(U) snd_seq_device(U) snd_p
cm_oss(U) snd_mixer_oss(U) snd_pcm(U) snd_timer(U) snd(U) soundcore(U) snd_page_
alloc(U) e752x_edac(U) edac_mc(U) ehci_hcd(U) i6300esb(U) pcspkr(U) uhci_hcd(U)
ata_piix(U) libata(U) sd_mod(U) scsi_mod(U) ext3(U) jbd(U)
CPU:ÂÂÂ 0
EIP:ÂÂÂ 0060:[<c043196a>]ÂÂÂ Tainted: GÂÂÂÂÂ VLI
EFLAGS: 00010207ÂÂ (2.6.18-194.el5 #1)
EIP is at queue_work+0x32/0x50
eax: dfdad470ÂÂ ebx: 00000000ÂÂ ecx: dfee7300ÂÂ edx: dfdad46c
esi: 00000000ÂÂ edi: dfdad000ÂÂ ebp: 00000100ÂÂ esp: de50fecc
ds: 007bÂÂ es: 007bÂÂ ss: 0068
Process ifup-eth (pid: 14665, ti=de50e000 task=d9030550 task.ti=de50e000)
Stack: dfdad400 dfdad614 c05628bf dfdad50c de50ff44 de50fefc c076a000 dfdad418
ÂÂÂÂÂÂ 00000100 c042bf99 dfdad400 c05623af de50fefc de50fefc 00000046 00000021
ÂÂÂÂÂÂ c0705308 0000000a c04286e0 00000000 00000046 de50ff44 d9030550 00000007
Call Trace:
Â[<c05628bf>] e1000_watchdog+0x510/0x56a
Â[<c042bf99>] run_timer_softirq+0x14d/0x1d0
Â[<c05623af>] e1000_watchdog+0x0/0x56a
Â[<c04286e0>] __do_softirq+0x87/0x114
Â[<c04287a3>] do_softirq+0x36/0x3a
Â[<c0406255>] do_IRQ+0x48/0x53
Â[<c0404896>] common_interrupt+0x1a/0x20
Â[<c042007b>] __build_sched_domains+0x87a/0xaa4
Â[<c0460cdb>] find_vma+0x30/0x51
Â[<c062ce4e>] do_page_fault+0x1b2/0x52d
Â[<c042c800>] sigprocmask+0xb0/0xce
Â[<c062cc9c>] do_page_fault+0x0/0x52d
Â[<c04049b5>] error_code+0x39/0x40
Â=======================
Code: 00 e0 ff ff 8b 70 10 90 0f ba 2a 00 19 c0 31 db 85 c0 75 30 8b 1d f4 b8 76
Âc0 8d 41 08 39 41 08 8d 42 04 0f 45 de 39 42 04 74 08 <0f> 0b 71 00 35 38 65 c0
Â8b 01 f7 d0 8b 04 98 bb 01 00 00 00 e8
EIP: [<c043196a>] queue_work+0x32/0x50 SS:ESP 0068:de50fecc
Â<0>Kernel panic - not syncing: Fatal exception in interrupt
Â<0>Rebooting in 60 seconds..
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ÂKrishna Mohan B
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