Re: kernel BUG at ide-cd.c:1726 in 2.6.24-03863-g0ba6c33 && -g8561b089

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My dmesg relevant info is quite similar:

[    6.875041] Freeing unused kernel memory: 320k freed
[    8.143120] ide-cd: rq still having bio: dev hdc: type=2, flags=114c8
[    8.144439]
[    8.144439] sector 10824201199534213, nr/cnr 0/0
[    8.144439] bio cf029280, biotail cf029280, buffer 00000000, data
00000000, len 158
[    8.144439] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
[    8.144439] backup: data_len=158  bi_size=158
[    8.160756] ide-cd: rq still having bio: dev hdc: type=2, flags=114c8
[    8.160756]
[    8.160756] sector 2669858, nr/cnr 0/0
[    8.160756] bio cf029300, biotail cf029300, buffer 00000000, data
00000000, len 158
[    8.160756] cdb: 12 01 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
[    8.160756] backup: data_len=158  bi_size=158
[   14.851101] eth0: link up
[   27.121883] eth0: no IPv6 routers present


And by the way, Kiyoshi,
This can be reproduced in a typical setup vmware workstation 6.02 with
a vritual IDE cdrom,
in case you wanna catch that with your own eyes. :-)
Thanks for your trying hard to correct this annoying bug.

Best Regards,

Nai


On 1/31/08, Roland Dreier <rdreier@xxxxxxxxx> wrote:
> > Could you try the patch below and give me all boot messages again?
>
> Sure, no problem, see below for full log (I updated to the latest git,
> which seems to have some other unrelated problems with things timing
> out earlier in the boot, but it does get to the ide-cd init); here's
> the relevant looking debug info:
>
>     [  163.990058] ide-cd: rq still having bio: dev hda: type=2, flags=114c8
>     [  163.990060]
>     [  163.990061] sector 1987647, nr/cnr 0/0
>     [  163.990063] bio ffff8101c418c200, biotail ffff8101c418c200, buffer
> 0000000000000000, data 0000000000000000, len 158
>     [  163.990064] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
>     [  163.990069] backup: data_len=158  bi_size=158
>     [  163.994021] ide-cd: rq still having bio: dev hda: type=2, flags=114c8
>     [  163.994023]
>     [  163.994024] sector 1987647, nr/cnr 0/0
>     [  163.994025] bio ffff8101c418c200, biotail ffff8101c418c200, buffer
> 0000000000000000, data 0000000000000000, len 158
>     [  163.994027] cdb: 12 01 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
>     [  163.994032] backup: data_len=158  bi_size=158
>
>  > This patch displays debug messages against requests still having bio,
>  > then tries to unlink all bios from the rq before the rq is completed.
>  > So your system may be able to continue to work correctly
>  > after displaying debug messages.
>
> By the way, even with your first debug patch, I had no problem using
> the box once it booted.  I didn't try the CD-ROM but everything else
> seemed fine.
>
> Also, I saw the same issue on a different box (Dell SC1435 with
> serverworks IDE):
>
>     [    1.367648] Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
>     [    1.371649] ide: Assuming 33MHz system bus speed for PIO modes;
> override with idebus=xx
>     [    2.612417] SvrWks HT1000: IDE controller (0x1166:0x0214 rev 0x00) at
>  PCI slot 0000:00:02.1
>     [    2.612439] SvrWks HT1000: not 100% native mode: will probe irqs
> later
>     [    2.616427]     ide0: BM-DMA at 0x08c0-0x08c7, BIOS settings:
> hda:DMA, hdb:pio
>     [    2.623505] Probing IDE interface ide0...
>     [    4.037070] hda: PHILIPS DVD-ROM SDR089, ATAPI CD/DVD-ROM drive
>     [    4.041801] hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4
>     [    4.058447] hda: UDMA/33 mode selected
>     [    4.061278] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
>     [    4.632739] hda: ATAPI 24X DVD-ROM drive, 2048kB Cache
>     ...
>     [    8.631615] ide-cd: rq still having bio: dev hda: type=2, flags=114c8
>     [    8.631615]
>     [    8.631615] sector 2867855, nr/cnr 0/0
>     [    8.631615] bio ffff81021fba3f40, biotail ffff81021fba3f40, buffer
> 0000000000000000, data 0000000000000000, len 158
>     [    8.631615] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
>     [    8.660505] ide-cd: rq still having bio: dev hda: type=2, flags=114c8
>     [    8.660505]
>     [    8.660505] sector 2867855, nr/cnr 0/0
>     [    8.660505] bio ffff81021fba3f40, biotail ffff81021fba3f40, buffer
> 0000000000000000, data 0000000000000000, len 62
>     [    8.660505] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00
>
> Let me know if you'd like debug info from that too.
>
>
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