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rando
 Post subject: Backend Freeze-Up
PostPosted: Fri Apr 28, 2006 8:47 pm 
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location: Winnipeg - Canada
So, I sat down at my WinXP system, which happened to have an SSH session open to my backend machine. I see the following in my putty screen:

Code:
Message from syslogd@backend at Fri Apr 28 21:37:08 2006 ...
backend kernel: flags:0x00000008 mapping:00000000 mapcount:-889192448 count:0

Message from syslogd@backend at Fri Apr 28 21:37:08 2006 ...
backend kernel: Backtrace:

Message from syslogd@backend at Fri Apr 28 21:37:08 2006 ...
backend kernel: Trying to fix it up, but a reboot is needed


The session is toast, I can't ctrl-c, I can't type, it's totally locked up. I turn on the TV to see if I can get any response from the backend itself, and it seems to be totally frozen. Back to the Windows PC, I attempt to ping the IP for the backend and get no response. Totally locked up, completely frozen. So I reboot.

Anybody have any idea what this is? What additional info can I provide that will may be relevant to this situation?
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mac
 Post subject:
PostPosted: Sat Apr 29, 2006 5:24 am 
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Joined: Tue Feb 21, 2006 7:24 am
Posts: 396
Location: Dushanbe, Tajikistan
every line in /var/log/messages has a time stamp
post the last few lines from before the crash. You can page through it with the "less" command.
(hit "q" to exit less)
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rando
 Post subject:
PostPosted: Sat Apr 29, 2006 8:16 am 
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location: Winnipeg - Canada
Code:
root@backend:~# cat /var/log/messages | grep 'Apr 28 21:3'
Apr 28 21:30:34 backend -- MARK --
Apr 28 21:36:47 backend kernel: c016dd60
Apr 28 21:36:47 backend kernel: PREEMPT SMP
Apr 28 21:36:47 backend kernel: Modules linked in: snd_pcm_oss sg nvidia sata_nv shpchp pci_hotplug ehci_hcd 8250_pnp pcspkr tsdev cx8800 cx88xx ir_common ivtv saa7115 msp3400 lirc_i2c lirc_dev ipv6 ttusb_dec ttusbdecfe dvb_ttusb_budget cx22700 budget_av tda10021 budget_ci budget s5h1420 budget_core dvb_ttpci l64781 tda8083 stv0297 sp8870 ttpci_eeprom saa7146_vv saa7146 mt312 tda1004x ves1820 stv0299 dvb_bt8xx nxt6000 mt352 dvb_pll sp887x ves1x93 evdev dst_ca or51211 lgdt330x dst bt878 cx24110 dvb_core bttv btcx_risc video_buf v4l2_common v4l1_compat skge autofs4 af_packet snd_mixer_oss snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd_page_alloc snd soundcore tda9887 wm8775 cx25840 tuner tveeprom i2c_algo_bit videodev forcedeth nvidia_agp agpgart i2c_nforce2 i2c_core parport_pc parport 8250 serial_core pcmcia firmware_class yenta_socket rsrc_nonstatic pcmcia_core video thermal processor fan container button battery ac rtc ohci1394 ieee1394 usb_storage ohci_hcd uhci_hcd usbcore a100u2w megaraid tmsc
Apr 28 21:36:47 backend kernel: im BusLogic
Apr 28 21:36:47 backend kernel: CPU:    0
Apr 28 21:36:47 backend kernel: EIP:    0060:[try_to_release_page+32/80]    Tainted: P      VLI
Apr 28 21:36:47 backend kernel: EFLAGS: 00010202   (2.6.15-chw-2)
Apr 28 21:36:47 backend kernel: EIP is at try_to_release_page+0x20/0x50
Apr 28 21:36:47 backend kernel: eax: 80000809   ebx: 00000000   ecx: 00298c68   edx: c13e7090
Apr 28 21:36:47 backend kernel: esi: 000000d0   edi: 00298c68   ebp: dfcc1eac   esp: dfcc1e10
Apr 28 21:36:47 backend kernel: ds: 007b   es: 007b   ss: 0068
Apr 28 21:36:47 backend kernel: Process kswapd0 (pid: 165, threadinfo=dfcc0000 task=dfc2b030)
Apr 28 21:36:47 backend kernel: Stack: 00298c68 c13e7090 c0158074 c13e7090 000000d0 00000001 00000000 00000012
Apr 28 21:36:47 backend kernel:        00000000 dfcc1e34 dfcc1e34 00000004 00000001 c111ce80 c136abfc c10d494c
Apr 28 21:36:47 backend kernel:        c1412e00 c1193308 c119332c c105fad8 c105fafc c10faa58 c10faa7c c115d470
Apr 28 21:36:47 backend kernel: Call Trace:
Apr 28 21:36:47 backend kernel:  [shrink_list+884/1088] shrink_list+0x374/0x440
Apr 28 21:36:47 backend kernel:  [shrink_cache+280/704] shrink_cache+0x118/0x2c0
Apr 28 21:36:47 backend kernel:  [shrink_zone+177/224] shrink_zone+0xb1/0xe0
Apr 28 21:36:47 backend kernel:  [balance_pgdat+631/928] balance_pgdat+0x277/0x3a0
Apr 28 21:36:47 backend kernel:  [kswapd+231/304] kswapd+0xe7/0x130
Apr 28 21:36:47 backend kernel:  [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
Apr 28 21:36:47 backend kernel:  [ret_from_fork+6/32] ret_from_fork+0x6/0x20
Apr 28 21:36:47 backend kernel:  [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
Apr 28 21:36:47 backend kernel:  [kswapd+0/304] kswapd+0x0/0x130
Apr 28 21:36:47 backend kernel:  [kernel_thread_helper+5/12] kernel_thread_helper+0x5/0xc
Apr 28 21:36:47 backend kernel: Code: c6 fe ff 01 d8 89 46 1c 5b eb ef 56 53 8b 54 24 0c 8b 74 24 10 8b 02 8b 4a 14 a8 01 74 32 8b 02 31 db f6 c4 10 75 24 85 c9 74 0a <8b> 41 40 8b 40 28 85 c0 75 0b 89 54 24 0c 5b 5e e9 8b 1e 00 00



The next line after 21:36:47 is my restart. Anything in here that makes any sense?
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mac
 Post subject:
PostPosted: Sat Apr 29, 2006 8:32 am 
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Joined: Tue Feb 21, 2006 7:24 am
Posts: 396
Location: Dushanbe, Tajikistan
yes. It looks like it might be SMP related.

Code:
Apr 28 21:36:47 backend kernel: c016dd60
Apr 28 21:36:47 backend kernel: PREEMPT SMP


Try to recompile your kernel without SMP support.

http://mysettopbox.tv/phpBB2/viewtopic.php?t=9218

Other things that come to mind are that it might be heat related.

Make sure that your CPU fan has not died. You can also try memtest86 to
see if your memory has gone flakey..
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rando
 Post subject:
PostPosted: Sat Apr 29, 2006 9:08 am 
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location: Winnipeg - Canada
Thanks for the pointers, SMP is multi-processor support, right? I don't have a dual core, so pulling that out wouldn't even hurt my performance at all.

Heat shouldn't be an issue, as this processor was being used in a warmer environment previous to my reinstall, but the stick of ram I"m using is different than what was in here earlier.

If I see the same again I'll likely swap in another stick or run a memtest.

Thanks again for the thoughts.
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mac
 Post subject:
PostPosted: Sat Apr 29, 2006 9:37 am 
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Joined: Tue Feb 21, 2006 7:24 am
Posts: 396
Location: Dushanbe, Tajikistan
Quote:
SMP is multi-processor support, right?


Yep - it ismulti-processor support.

It looks like SMP may have caused the crash. The register dump
and the stack trace is about equal to the blue screen of death in windows.

If it only happens once blue moon it may not be worth your trouble to fix.. unless
it blows up and causes your wife to miss oprah ;)
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rando
 Post subject:
PostPosted: Sat Apr 29, 2006 9:43 am 
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location: Winnipeg - Canada
She's not so much into Oprah, but there are plenty of other shows in the Queue that are important to catch.

I'll see what the coming days bring and take things from there.
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