[Ocfs2-users] kernel panic - ocfs2-1.4.1 - redhat EL5 2.6.18-92.el5xen

[Sunil Mushran]

Please file a bugzilla. Add this stack trace to it.
http://oss.oracle.com/bugzilla

Also add any detail about your environment that you feel
could be relevant. Size of cluster, number of mounts, etc.

Thanks
Sunil

James Masson wrote:
> Hi list,
>
> We've just had a kernel panic/reboot on one of our ocfs2 cluster nodes.
> It's a 3 node cluster of xen Dom U's running Redhat EL5.2, and they're
> normally very stable.
>
> Has anybody seen this particular fault before, or can anyone provide an
> analysis?
>
> thanks
>
> James Masson
>
> #############
> (1796,1):ocfs2_unlock_ast:2739 ERROR: Dlm passes status 24 for lock
> M000000000000000010031300000000, unlock_action 1
> (1796,1):dlmunlock:685 ERROR: dlm status = DLM_BADPARAM
> (1796,1):ocfs2_cancel_convert:3036 ERROR: Dlm error "DLM_BADPARAM" while
> calling dlmunlock on resource M000000000000000010031300000000: invalid
> lock mode specified
> (1796,1):ocfs2_unblock_lock:3071 ERROR: status = -22
> (1796,1):ocfs2_process_blocked_lock:3375 ERROR: status = -22
> (1796,1):ocfs2_prepare_downconvert:2941 ERROR: lockres->l_level (0) <=
> new_level (0)
> ----------- [cut here ] --------- [please bite here ] ---------
> Kernel BUG at ...uild/smushran/BUILD/ocfs2-1.4.1/fs/ocfs2/dlmglue.c:2942
> invalid opcode: 0000 [1] SMP
> last sysfs file: /block/dm-1/range
> CPU 1
> Modules linked in: i2c_dev i2c_core hidp l2cap bluetooth ocfs2(U)
> ocfs2_dlmfs(U) ocfs2_dlm(U) ocfs2_nodemanager(U) configfs sunrpc xennet
> ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib
> _addr iscsi_tcp libiscsi scsi_transport_iscsi scsi_mod dm_multipath
> parport_pc lp parport pcspkr dm_snapshot dm_zero dm_mirror dm_mod xenblk
> ext3 jbd uhci_hcd ohci_hcd ehci_hcd
> Pid: 1796, comm: ocfs2dc Tainted: G      2.6.18-92.el5xen #1
> RIP: e030:[<ffffffff882eaf5a>]  [<ffffffff882eaf5a>]
> :ocfs2:ocfs2_prepare_downconvert+0x8e/0x10d
> RSP: e02b:ffff8801f6b6be50  EFLAGS: 00010082
> RAX: 0000000000000058 RBX: ffff88009c061300 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffff88009c061300 RDI: 0000000000000001
> RBP: 0000000000000000 R08: ffffffff804db7a8 R09: 00000000000020db
> R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801f68b9800
> R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
> FS:  00002b77a23df250(0000) GS:ffffffff805ae080(0000) knlGS:0000000000000000
> CS:  e033 DS: 0000 ES: 0000
> Process ocfs2dc (pid: 1796, threadinfo ffff8801f6b6a000, task
> ffff8801ffa75100)
> Stack:  ffff88009c061310  0000000000000000  ffff88009c061300 
> ffffffff882f02ac
>  0000000000000001  00000000802875cb  0000000000000000  ffff8801ffa75100
>  ffffffff8029b941  ffff8801f6b6be98
> Call Trace:
>  [<ffffffff882f02ac>] :ocfs2:ocfs2_downconvert_thread+0x4db/0x83b
>  [<ffffffff8029b941>] autoremove_wake_function+0x0/0x2e
>  [<ffffffff8029b729>] keventd_create_kthread+0x0/0xc4
>  [<ffffffff882efdd1>] :ocfs2:ocfs2_downconvert_thread+0x0/0x83b
>  [<ffffffff8029b729>] keventd_create_kthread+0x0/0xc4
>  [<ffffffff802339c8>] kthread+0xfe/0x132
>  [<ffffffff80260b24>] child_rip+0xa/0x12
>  [<ffffffff8029b729>] keventd_create_kthread+0x0/0xc4
>  [<ffffffff802338ca>] kthread+0x0/0x132
>  [<ffffffff80260b1a>] child_rip+0x0/0x12
>
>
> MCode: 0f 0b 68 d7 da 31 88 c2 7e 0b f6 05 77 d5 f7 ff 08 74 4c f6
> MRIP  [<ffffffff882eaf5a>] :ocfs2:ocfs2_prepare_downconvert+0x8e/0x10d
> M RSP <ffff8801f6b6be50>
> M <0>Kernel panic - not syncing: Fatal exception
> ###################
>
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