buffer i/o error

buffer i/o error

[Andrej Hocevar]

Hello, I suddenly realized that one of my external disks (a Western Digital
MyBook usb disk) wasn't accessible anymore. Then I found the following message.
There seems to have been no apparent damage or loss, but I'm reporting it
anyway.

Regards,

Andrej Hocevar


------------[ cut here ]------------
WARNING: at fs/buffer.c:1186 mark_buffer_dirty+0x20/0x69()
Modules linked in: nls_cp437 isofs loop xt_state xt_tcpudp iptable_filter
ip_tables x_tables nf_nat_ftp nf_nat nf_conntrack_ipv4 nfDec  3 16:24:58 stoa
kernel: Pid: 12202, comm: umount Not tainted 2.6.27.7home #1
 [<c0118eae>] warn_on_slowpath+0x40/0x63
 [<c0151c22>] check_object+0x10d/0x197
 [<c0152e76>] __slab_alloc+0x366/0x3de
 [<c011394b>] place_entity+0x9c/0xde
 [<c011388f>] update_curr+0x3d/0x5d
 [<c01149a0>] __dequeue_entity+0x1f/0x71
 [<c01158f0>] pick_next_task_fair+0xdf/0xe9
 [<c016fe20>] mark_buffer_dirty+0x20/0x69
 [<c0198b88>] journal_update_superblock+0x4a/0x7c
 [<c0198e00>] journal_destroy+0x101/0x146
 [<c0126742>] autoremove_wake_function+0x0/0x2d
 [<c018fcfd>] ext3_put_super+0x1f/0x147
 [<c01578a6>] generic_shutdown_super+0x4a/0xad
 [<c0157915>] kill_block_super+0xc/0x1b
 [<c0157983>] deactivate_super+0x2c/0x3f
 [<c0167772>] sys_umount+0x253/0x279
 [<c01677a3>] sys_oldumount+0xb/0xe
 [<c0102b36>] syscall_call+0x7/0xb
 [<c0310000>] via_ircc_open+0xfa/0x59b
 =======================
---[ end trace af37a7a2247422ea ]---

 
Linux stoa 2.6.27.7home #1 Sun Nov 23 14:37:46 CET 2008 i686 GNU/Linux
 
Gnu C                  4.3.2
Gnu make               3.81
binutils               2.18.0.20080103
util-linux             2.13.1.1
mount                  2.13.1
module-init-tools      found
PPP                    2.4.4
Linux C Library        2.7
Dynamic linker (ldd)   2.7
Procps                 3.2.7
Console-tools          0.2.3
Sh-utils               6.10
udev                   125
Modules Loaded         nls_cp437 isofs loop xt_state xt_tcpudp iptable_filter
ip_tables x_tables nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_conntrack_ftp
nf_conntrack snd_mixer_oss ppdev lp cpufreq_stats fuse sr_mod sbp2 snd_intel8x0
snd_ac97_codec ac97_bus 8250_pci 8250 snd_pcm snd_timer rng_core serial_core
snd_page_alloc video output parport_pc parport sd_mod evdev ide_cd_mod cdrom
ide_disk usb_storage usbhid scsi_mod piix ohci1394 ide_core ieee1394 ehci_hcd
uhci_hcd usbcore unix

--
www.ljudmila.org/ludliteratura

Re: buffer i/o error

[Stefan Richter]

Andrej Hocevar wrote:
> Hello, I suddenly realized that one of my external disks (a Western Digital
> MyBook usb disk) wasn't accessible anymore. Then I found the following message.
> There seems to have been no apparent damage or loss, but I'm reporting it
> anyway.
> 
> Regards,
> 
> Andrej Hocevar
> 
> 
> ------------[ cut here ]------------
> WARNING: at fs/buffer.c:1186 mark_buffer_dirty+0x20/0x69()
[...]
>  [<c016fe20>] mark_buffer_dirty+0x20/0x69
>  [<c0198b88>] journal_update_superblock+0x4a/0x7c
>  [<c0198e00>] journal_destroy+0x101/0x146
>  [<c0126742>] autoremove_wake_function+0x0/0x2d
>  [<c018fcfd>] ext3_put_super+0x1f/0x147
>  [<c01578a6>] generic_shutdown_super+0x4a/0xad
>  [<c0157915>] kill_block_super+0xc/0x1b
[...]

This warning typically happens when the connection to a disk was lost.
Alas it doesn't tell /why/ the connection was lost.

http://kerneloops.org/guilty.php?guilty=journal_update_superblock has
more of this sort.
-- 
Stefan Richter
-=====-==--- ==-- ---==
http://arcgraph.de/sr/