Hi, 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) kick(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: 0 EIP: 0060:[<c043196a>] Tainted: G VLI EFLAGS: 00010207 (2.6.18-194.el5 #1) EIP is at queue_work+0x32/0x50 eax: dfdad470 ebx: 00000000 ecx: dfee7300 edx: dfdad46c esi: 00000000 edi: dfdad000 ebp: 00000100 esp: de50fecc ds: 007b es: 007b ss: 0068 Process ifup-eth (pid: 14665, ti=de50e000 task=d9030550 task.ti=de50e000) Stack: dfdad400 dfdad614 c05628bf dfdad50c de50ff44 de50fefc c076a000 dfdad418 00000100 c042bf99 dfdad400 c05623af de50fefc de50fefc 00000046 00000021 c0705308 0000000a c04286e0 00000000 00000046 de50ff44 d9030550 00000007 Call Trace: [<c05628bf>] e1000_watchdog+0x510/0x56a [<c042bf99>] run_timer_softirq+0x14d/0x1d0 [<c05623af>] e1000_watchdog+0x0/0x56a [<c04286e0>] __do_softirq+0x87/0x114 [<c04287a3>] do_softirq+0x36/0x3a [<c0406255>] do_IRQ+0x48/0x53 [<c0404896>] common_interrupt+0x1a/0x20 [<c042007b>] __build_sched_domains+0x87a/0xaa4 [<c0460cdb>] find_vma+0x30/0x51 [<c062ce4e>] do_page_fault+0x1b2/0x52d [<c042c800>] sigprocmask+0xb0/0xce [<c062cc9c>] do_page_fault+0x0/0x52d [<c04049b5>] error_code+0x39/0x40 ======================= 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 c0 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 8b 01 f7 d0 8b 04 98 bb 01 00 00 00 e8 EIP: [<c043196a>] queue_work+0x32/0x50 SS:ESP 0068:de50fecc <0>Kernel panic - not syncing: Fatal exception in interrupt <0>Rebooting in 60 seconds.. -- -- Krishna Mohan B