[Linux-cluster] Kernel Oops gfs:gfs_glock_dq

[Reiner Rottmann]

Hi,

we experienced a kernel oops in gfs:gfs_glock_dq for the first time and we 
would like to know if there are others who are affected by this issue.

Although the node was successfully fenced by the cluster and could rejoin 
without any troubles we are curious about what happened. There are no 
suspicious log entries preceding the oops messages.

Is this perhaps a known bug and maybe already solved?


# cat /var/log/messages
...
Aug 17 17:45:00 node01.mgmt  Unable to handle kernel NULL pointer dereference 
at 0000000000000000 RIP:
Aug 17 17:45:00 node01.mgmt  <ffffffffa0179aef>{:gfs:gfs_glock_dq+191}
Aug 17 17:45:00 node01.mgmt  PML4 9363d067 PGD d5119067 PMD 0
Aug 17 17:45:00 node01.mgmt  Oops: 0000 [1] SMP
Aug 17 17:45:00 node01.mgmt  CPU 3
Aug 17 17:45:00 node01.mgmt  Modules linked in: parport_pc lp parport 
netconsole netdump autofs4 i2c_dev i2c_core sunrpc ds yenta_socket 
pcmcia_core ext3 j
bd button battery ac ohci_hcd hw_random scsi_transport_fc md5 ipv6 lock_dlm(U) 
dlm(U) gfs(U) lock_harness(U) cman(U) 8021q bonding(U) qla2300(U) qla2xxx_co
nf(U) qla2xxx(U) sd_mod scsi_mod dm_snapshot dm_mirror dm_mod tg3
Aug 17 17:45:00 node01.mgmt  Pid: 13218, comm: site_search_dev Not tainted 
2.6.9-42.0.3.ELsmp
Aug 17 17:45:00 node01.mgmt  RIP: 0010:[<ffffffffa0179aef>] 
<ffffffffa0179aef>{:gfs:gfs_glock_dq+191}
Aug 17 17:45:00 node01.mgmt  RSP: 0018:0000010042b33ce8  EFLAGS: 00010203
Aug 17 17:45:00 node01.mgmt  RAX: 000001009cc5c368 RBX: 0000000000000000 RCX: 
00000100af058d50
Aug 17 17:45:00 node01.mgmt  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 
000001009cc5c35c
Aug 17 17:45:00 node01.mgmt  RBP: 000001009cc5c330 R08: 0000000000000000 R09: 
0000000000000000
Aug 17 17:45:00 node01.mgmt  R10: 0000000000000000 R11: 00000100af058ce0 R12: 
000001009cc5c35c
Aug 17 17:45:01 node01.mgmt  R13: 0000010008fcc5e8 R14: ffffff00005a3000 R15: 
00000100234079a8
Aug 17 17:45:01 node01.mgmt  FS:  0000002a95561a20(0000) GS:ffffffff804e5300
(0000) knlGS:0000000000000000
Aug 17 17:45:01 node01.mgmt  CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Aug 17 17:45:01 node01.mgmt  CR2: 0000000000000000 CR3: 0000000001050000 CR4: 
00000000000006e0
Aug 17 17:45:01 node01.mgmt  Process site_search_dev (pid: 13218, threadinfo 
0000010042b32000, task 000001004886d7f0)
Aug 17 17:45:01 node01.mgmt  Stack: 0000010042b33cf8 00012c5400000000 
ffffffffa01b99c0 0000010008fcc5e8
Aug 17 17:45:01 node01.mgmt         0000010008fcc5c0 0000010008fcc5e8 
00000100dd2625e8 0000000000000000
Aug 17 17:45:01 node01.mgmt         0000000000000000 ffffffffa0179c08
Aug 17 17:45:01 node01.mgmt  Call 
Trace:<ffffffffa0179c08>{:gfs:gfs_glock_dq_uninit+9} 
<ffffffffa018ef63>{:gfs:gfs_flock+222}
Aug 17 17:45:01 node01.mgmt         
<ffffffffa01e1781>{:lock_dlm:get_resource+84} 
<ffffffffa01e23d7>{:lock_dlm:lm_dlm_punlock+642}
Aug 17 17:45:01 node01.mgmt         <ffffffff8018e5e4>{locks_remove_flock+97} 
<ffffffff8017a21d>{__fput+73}
Aug 17 17:45:01 node01.mgmt         <ffffffff80178e48>{filp_close+103} 
<ffffffff80178ed1>{sys_close+130}
Aug 17 17:45:01 node01.mgmt         <ffffffff8011026a>{system_call+126}
Aug 17 17:45:01 node01.mgmt
Aug 17 17:45:01 node01.mgmt  Code: 48 8b 02 0f 18 08 48 8d 45 38 48 39 c2 74 
0c ff 44 24 0c 49
Aug 17 17:45:01 node01.mgmt  RIP <ffffffffa0179aef>{:gfs:gfs_glock_dq+191} RSP 
<0000010042b33ce8>
Aug 17 17:45:01 node01.mgmt  CR2: 0000000000000000
...

$ uname -a
Linux node01 2.6.9-42.0.3.ELsmp #1 SMP Fri Oct 6 06:28:26 CDT 2006 x86_64 
x86_64 x86_64 GNU/Linux

$ rpm -qa
...
hp_qla2x00src-8.01.06-7
kernel-smp-2.6.9-42.0.3.EL
kernel-smp-devel-2.6.9-42.0.3.EL
ccs-1.0.7-0
cman-1.0.11-0
cman-kernel-smp-2.6.9-45.8
dlm-1.0.1-1
dlm-kernel-smp-2.6.9-44.3
GFS-6.1.6-1
GFS-kernel-smp-2.6.9-60.3
magma-1.0.6-0
magma-plugins-1.0.9-0
...


-- 
Gruss / Regards,

Dipl.-Ing. (FH) Reiner Rottmann

Phone: +49-89 452 3538-12

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