[OpenAFS] Still Kernel Bug message and client hang

[Hans-Gunther Borrmann]

Hello,

I still see the following Kernel Bug message in /var/log/messages. Thereafter 
any process trying to access a file, local or not, hangs The machine has to 
be reset.

Kernel BUG at "fs/inode.c":1094
invalid operand: 0000 [1] SMP
CPU 1
ide_cd cdrom
Pid: 5316, comm: php.exe Tainted: P      2.6.12
RIP: 0010:[<ffffffff8018f77e>] <ffffffff8018f77e>{iput+30}
RSP: 0018:ffff810062db3dc8  EFLAGS: 00010246
RAX: ffffffff880c6540 RBX: ffff8100f778d800 RCX: 0000000000000000
RDX: ffff81007951ae90 RSI: ffff810062db3d58 RDI: ffff8100f778d800
RBP: ffff8100f778d800 R08: 0000000000000000 R09: ffff810062db3d58
R10: 000000000000000b R11: ffffffff8809df50 R12: ffff8100f309ecd0
R13: ffffffff880c5a00 R14: 00007fffffc17e30 R15: 00007fffffc1b210
FS:  00000000008f4ae0(0063) GS:ffffffff804627c0(0000) knlGS:0000000008208760
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000000051fa10 CR3: 00000000dbe9e000 CR4: 00000000000006e0
Process php.exe (pid: 5316, threadinfo ffff810062db2000, task 
ffff81007951ae90)
Stack: ffffffff880c5a00 ffffffff880660a1 ffff8100f7eb4400 ffff8100f7eb4400
ffffffff8809e0d5 ffff810062db3e68 ffff810062db3ef8
0000000000000000 0000000000000296
Call Trace:<ffffffff880660a1>{:libafs:afs_PutVCache+161} 
<ffffffff8809e0d5>{:libafs:afs_linux_getattr+389}
<ffffffff8017ed1d>{vfs_lstat+61} <ffffffff8017f13f>{sys_newlstat+31}
<ffffffff8010da46>{system_call+126}
Code: 0f 0b 40 1e 32 80 ff ff ff ff 46 04 66 66 90 66 66 90 48 85
RIP <ffffffff8018f77e>{iput+30} RSP <ffff810062db3dc8>

Hardware: AMD Dual Opteron
Operating system: Gentoo Linux
Kernel: vanilla kernel 2.12.6
OpenAFS 1.3.84
cacheinfo: /afs:/usr/vice/cache:1651000
real cache size: 2064208K
afsd parameters: "-fakestat -stat 10000 -dcache 4000 -daemons 5 -volumes 256 
-files 50000"

This problem is urgent for me because I have to migrate our central webservice 
to this machine. All our  web pages are  in AFS. So any help is appreciated.

Thanks in advance
Gunther
-- 
________________________________________________________________
Hans-Gunther Borrmann <hans-gunther.borrmann@rz.uni-freiburg.de>
Rechenzentrum der Universitaet Freiburg
Hermann-Herder-Str. 10, D79104 FREIBURG
Tel.: +49 761/203-4652
Fax:  +49 761/203-4643