[mythtv-users] Help diagnosing hardlocks / kernel oops.

[Joe Votour]

I would recommend that you try to compile MythTV with
debigging enabled (if possible), as it will give more
information.

The reason that mythbackend blew up is because of a
trashed pointer (trying to read data at address
0x41474147), thus, a pointer had the characters "AGAG"
written where they shouldn't be.  Could be a buffer
overrun in the code that caused the pointer to get
trashed.

Other than that, I couldn't say.

-- Joe

--- John Freer <john_freer at yahoo.com> wrote:
> Hi all,
> 
> Do these logs mean anything to anyone?  Suggestions
> on diagnosis? 
> This is everything within 10 mins of the lockup
> event.
> 
> Thanks,
> John.
> 
> *******************
> [root at numbernine log]# more messages | grep "Apr 24
> 19:40"
> Apr 24 19:40:18 numbernine kernel: Unable to handle
> kernel paging
> request at virtual address 41474147
> Apr 24 19:40:18 numbernine kernel:  printing eip:
> Apr 24 19:40:18 numbernine kernel: c0147c2f
> Apr 24 19:40:18 numbernine kernel: *pde = 00000000
> Apr 24 19:40:18 numbernine kernel: Oops: 0002 [#1]
> Apr 24 19:40:18 numbernine kernel: Modules linked
> in: dvb_bt8xx(U)
> dvb_core(U) nxt6000(U) mt352(U) dst(U) bt878(U)
> sp887x(U) cx24110(U)
> or51211(U) parport_pc lp parport autofs4 sunrpc
> nvidia(U) md5 ipv6
> xfs video button battery ac lirc_i2c(U) lirc_dev(U)
> tvaudio(U)
> bttv(U) video_buf(U) v4l2_common(U) btcx_risc(U)
> msp3400(U)
> saa7115(U) tuner(U) tveeprom(U) ivtv(U) i2c_algo_bit
> i2c_core
> videodev snd_bt87x(U) snd_intel8x0(U)
> snd_ac97_codec(U)
> snd_pcm_oss(U) snd_mixer_oss(U) snd_pcm(U)
> snd_timer(U) snd(U)
> soundcore snd_page_alloc(U) forcedeth sk98lin ext3
> jbd dm_mod
> Apr 24 19:40:18 numbernine kernel: CPU:    0
> Apr 24 19:40:18 numbernine kernel: EIP:   
> 0060:[<c0147c2f>]   
> Tainted: PF     VLI
> Apr 24 19:40:18 numbernine kernel: EFLAGS: 00010046 
> 
> (2.6.10-1.770_14.rhfc3.at) 
> Apr 24 19:40:18 numbernine kernel: EIP is at
> cache_alloc_refill+0x150/0x23e
> Apr 24 19:40:18 numbernine kernel: eax: 41474143  
> ebx: dffed4c0  
> ecx: d1570000   edx: dffed4cc
> Apr 24 19:40:18 numbernine kernel: esi: ffffffff  
> edi: dffed4cc  
> ebp: dffe8400   esp: d9d1bcf4
> Apr 24 19:40:18 numbernine kernel: ds: 007b   es:
> 007b   ss: 0068
> Apr 24 19:40:18 numbernine kernel: Process
> mythbackend (pid: 4210,
> threadinfo=d9d1a000 task=d4ff55f0)
> Apr 24 19:40:18 numbernine kernel: Stack: 00000050
> 00000050 dffed4c0
> 00000202 00000001 c0147f6c 00000000 00000000 
> Apr 24 19:40:18 numbernine kernel:        00001000
> c0165d16 00000000
> c016385b c12b66e0 c12b66e0 00000000 d9d1bde8 
> Apr 24 19:40:18 numbernine kernel:        c12b66e0
> c016415e 0000000c
> dd68f9e4 c0164634 df272800 d9d1bd74 c034f914 
> Apr 24 19:40:18 numbernine kernel: Call Trace:
> Apr 24 19:40:18 numbernine kernel:  [<c0147f6c>]
> kmem_cache_alloc+0x3f/0x45
> Apr 24 19:40:18 numbernine kernel:  [<c0165d16>]
> alloc_buffer_head+0xd/0x22
> Apr 24 19:40:18 numbernine kernel:  [<c016385b>]
> alloc_page_buffers+0x21/0x8b
> Apr 24 19:40:18 numbernine kernel:  [<c016415e>]
> create_empty_buffers+0x10/0x152
> Apr 24 19:40:18 numbernine kernel:  [<c0164634>]
> __block_prepare_write+0x91/0x3d6
> 
> -----------------------------------
> John J Freer, P.E.
> 518.441.9647 / john_freer at yahoo.com
> > _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
>
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> 

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