2.5.59 OOPS w/ fdisk & devfs

2.5.59 OOPS w/ fdisk & devfs

[David Ford]

Unable to handle kernel paging request at virtual address 6b6b6b87
 printing eip:
c018ddf3
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0060:[<c018ddf3>]    Not tainted
EFLAGS: 00010202
EIP is at _devfs_unhook+0x2b/0x70
eax: 6b6b6b6b   ebx: 6b6b6b6b   ecx: c109312c   edx: 6b6b6b6b
esi: 00000002   edi: c109312c   ebp: 6b6b6b6b   esp: c1d41f0c
ds: 007b   es: 007b   ss: 0068
Process fdisk (pid: 178, threadinfo=c1d40000 task=c162c100)
Stack: c109312c c018de4a c109312c c109312c 00000002 c1503520 c10c2874 
c018deeb
       6b6b6b6b c109312c c10b904c c01758ad c109312c c108f850 c0175ad7 
c10c2874
       00000002 c108f868 c108f850 c1503520 c15b4924 00000000 c0279ebf 
c10c2874
Call Trace:
 [<c018de4a>] _devfs_unregister+0x12/0x90
 [<c018deeb>] devfs_unregister+0x23/0x30
 [<c01758ad>] delete_partition+0x49/0x58
 [<c0175ad7>] rescan_partitions+0x6b/0xf0
 [<c0279ebf>] blkdev_reread_part+0x5b/0x74
 [<c027a247>] blkdev_ioctl+0x24b/0x379
 [<c0156f49>] sys_ioctl+0x21d/0x274
 [<c0108dd7>] syscall_call+0x7/0xb

Code: 89 42 1c 8b 51 1c 85 d2 75 08 8b 41 18 89 43 10 eb 06 8b 41
 <6>note: fdisk[178] exited with preempt_count 2

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Re: 2.5.59 OOPS w/ fdisk & devfs

[Andrew Morton]

David Ford <david+cert@blue-labs.org> wrote:
>
> Unable to handle kernel paging request at virtual address 6b6b6b87
> ...
> EIP is at _devfs_unhook+0x2b/0x70


Look.  devfs is sick.  Richard has disappeared.  Al did some work on it and
also disappeared.  Adam laid it on the ground and drove a truck over it, and
I had that patch in -mm for two or three weeks and had one single, sole, sad,
sorry report from a tester.

I dropped Adam's patch out again because it might have been implicated in
weird system hangs.

So what are we to do?  It appears that kernel developers do not use devfs,
and people who _do_ use devfs either did not test Adam's patch, or forgot to
send in a report.

I shall reinclude Adam's patch.  Will people who use devfs *please* test it,
and send in a report?  Otherwise the whole thing is just going nowhere.

Re: 2.5.59 OOPS w/ fdisk & devfs

[David Ford]

Well, don't jump too fast :)

I have been having extreme hardware issues with this box for the past 
several hours.  I thought it was 2.5.59 giving me grief but an old 
kernel I had laying around presented similar issues.  I'm busy swapping 
cables, memory, etc to see who is being the bad guy.

So far, I've had issues with reiserfs, raw dd, mkreiserfs, tar, cp, mv 
(insert a lot of shell commands), interpreters, you name it.  Nothing 
seems common except that it all occurs when hda data is going somewhere 
else.  I just swapped my udma66 cable on hda and I'm trying to stress 
test hda now.

David

Andrew Morton wrote:

>David Ford <david+cert@blue-labs.org> wrote:
>  
>
>>Unable to handle kernel paging request at virtual address 6b6b6b87
>>...
>>EIP is at _devfs_unhook+0x2b/0x70
>>    
>>
>
>
>Look.  devfs is sick.  Richard has disappeared.  Al did some work on it and
>also disappeared.  Adam laid it on the ground and drove a truck over it, and
>I had that patch in -mm for two or three weeks and had one single, sole, sad,
>sorry report from a tester.
>  
>