[Ocfs2-users] Panic on high SYSTEM CPU

Sunil Mushran sunil.mushran at oracle.com
Mon Oct 26 14:24:23 PDT 2009 

So I have not seen this in a long time. We appear to be getting a double
bast for a dentry lock. The second bast was received after the lockres
was freed by the fs.

2.6.24 is a 2 year old kernel. Upgrade to something more latest. We have
made numerous changes. If you want a stable distro, use one of the 
enterprise
kernels that we support.

Laurence Mayer wrote:
> I have seen a couple of times that when SYSTEM CPU is running very 
> high, the node receives a panic.
>
> I would think this is not working as designed, Is there a way to 
> prevent this?
>
>
> Oct 25 16:32:45 n8 kernel: [1554039.835464] general protection fault: 
> 0000 [1] SMP
> Oct 25 16:32:45 n8 kernel: [1554039.835509] CPU 3
> Oct 25 16:32:45 n8 kernel: [1554039.835536] Modules linked in: nfs 
> lockd nfs_acl sunrpc ocfs2 crc32c libcrc32c ipmi_devintf ipmi_si 
> ipmi_msghandler ocfs2_dlmfs ocfs2_dlm ocfs
> 2_nodemanager configfs iptable_filter ip_tables x_tables xfs ipv6 
> ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp 
> libiscsi scsi_transport_iscsi parport_pc
> lp parport loop serio_raw psmouse i2c_piix4 button i2c_core k8temp 
> dcdbas shpchp pci_hotplug pcspkr evdev ext3 jbd mbcache sg sr_mod 
> cdrom sd_mod ata_generic usbhid hid pata_
> acpi pata_serverworks sata_svw tg3 libata ehci_hcd ohci_hcd scsi_mod 
> usbcore thermal processor fan fbcon tileblit font bitblit softcursor fuse
> Oct 25 16:32:45 n8 kernel: [1554039.835947] Pid: 4925, comm: o2net 
> Tainted: G   M    2.6.24-24-server #1
> Oct 25 16:32:45 n8 kernel: [1554039.835982] RIP: 
> 0010:[<ffffffff88472a7e>]  [<ffffffff88472a7e>] 
> :ocfs2:ocfs2_get_dentry_osb+0xe/0x20
> Oct 25 16:32:45 n8 kernel: [1554039.836060] RSP: 
> 0000:ffff810414811ca8  EFLAGS: 00010282
> Oct 25 16:32:45 n8 kernel: [1554039.836093] RAX: 0000940513688ddd RBX: 
> ffff8103db805018 RCX: 0000000000000005
> Oct 25 16:32:45 n8 kernel: [1554039.836145] RDX: ffff81036c912980 RSI: 
> 0000000000000005 RDI: ffff8103db805018
> Oct 25 16:32:45 n8 kernel: [1554039.836197] RBP: ffff8103db805200 R08: 
> ffff8103db805200 R09: ffff8103e7ae9200
> Oct 25 16:32:45 n8 kernel: [1554039.836250] R10: 000000000000004e R11: 
> ffffffff8847a580 R12: 080000000005364d
> Oct 25 16:32:45 n8 kernel: [1554039.836302] R13: 0000000000000005 R14: 
> 0000000000000000 R15: 000000000000001f
> Oct 25 16:32:45 n8 kernel: [1554039.836355] FS:  
> 00002b9aaa791ff0(0000) GS:ffff810416d25c80(0000) knlGS:00000000f54d2b90
> Oct 25 16:32:45 n8 kernel: [1554039.836409] CS:  0010 DS: 0018 ES: 
> 0018 CR0: 000000008005003b
> Oct 25 16:32:45 n8 kernel: [1554039.836442] CR2: 00002b9aab037000 CR3: 
> 0000000215df3000 CR4: 00000000000006e0
> Oct 25 16:32:45 n8 kernel: [1554039.836494] DR0: 0000000000000000 DR1: 
> 0000000000000000 DR2: 0000000000000000
> Oct 25 16:32:45 n8 kernel: [1554039.836546] DR3: 0000000000000000 DR6: 
> 00000000ffff0ff0 DR7: 0000000000000400
> Oct 25 16:32:45 n8 kernel: [1554039.836599] Process o2net (pid: 4925, 
> threadinfo ffff810414810000, task ffff8104145ae7f0)
> Oct 25 16:32:45 n8 kernel: [1554039.836653] Stack:  ffffffff8847a5a6 
> ffff810413c53000 0000000046c107d6 ffff8102f2437028
> Oct 25 16:32:45 n8 kernel: [1554039.836716]  0000000000000000 
> ffff8103db805200 080000000005364d ffff8102f2437018
> Oct 25 16:32:45 n8 kernel: [1554039.836777]  0000000000000000 
> 000000000000001f ffffffff8840aef4 000000000000012c
> Oct 25 16:32:45 n8 kernel: [1554039.836818] Call Trace:
> Oct 25 16:32:45 n8 kernel: [1554039.836874]  [<ffffffff8847a5a6>] 
> :ocfs2:ocfs2_blocking_ast+0x26/0x310
> Oct 25 16:32:45 n8 kernel: [1554039.836924]  
> [ocfs2_dlm:dlm_proxy_ast_handler+0x824/0x830] 
> :ocfs2_dlm:dlm_proxy_ast_handler+0x824/0x830
> Oct 25 16:32:45 n8 kernel: [1554039.836988]  
> [ocfs2_nodemanager:do_gettimeofday+0x2f/0x2fb90] do_gettimeofday+0x2f/0xc0
> Oct 25 16:32:45 n8 kernel: [1554039.837035]  
> [ocfs2_nodemanager:o2net_process_message+0x4cc/0x5b0] 
> :ocfs2_nodemanager:o2net_process_message+0x4cc/0x5b0
> Oct 25 16:32:45 n8 kernel: [1554039.837096]  
> [__dequeue_entity+0x3d/0x50] __dequeue_entity+0x3d/0x50
> Oct 25 16:32:45 n8 kernel: [1554039.837137]  
> [ocfs2_nodemanager:o2net_recv_tcp_msg+0x65/0x80] 
> :ocfs2_nodemanager:o2net_recv_tcp_msg+0x65/0x80
> Oct 25 16:32:45 n8 kernel: [1554039.839042]  
> [ocfs2_nodemanager:o2net_rx_until_empty+0x38b/0x900] 
> :ocfs2_nodemanager:o2net_rx_until_empty+0x38b/0x900
> Oct 25 16:32:45 n8 kernel: [1554039.839106]  
> [ocfs2_nodemanager:o2net_rx_until_empty+0x0/0x900] 
> :ocfs2_nodemanager:o2net_rx_until_empty+0x0/0x900
> Oct 25 16:32:45 n8 kernel: [1554039.839165]  
> [run_workqueue+0xcc/0x170] run_workqueue+0xcc/0x170
> Oct 25 16:32:45 n8 kernel: [1554039.839198]  [worker_thread+0x0/0x110] 
> worker_thread+0x0/0x110
> Oct 25 16:32:45 n8 kernel: [1554039.839232]  [worker_thread+0x0/0x110] 
> worker_thread+0x0/0x110
> Oct 25 16:32:45 n8 kernel: [1554039.839266]  
> [worker_thread+0xa3/0x110] worker_thread+0xa3/0x110
> Oct 25 16:32:45 n8 kernel: [1554039.839300]  [<ffffffff80254510>] 
> autoremove_wake_function+0x0/0x30
> Oct 25 16:32:45 n8 kernel: [1554039.839336]  [worker_thread+0x0/0x110] 
> worker_thread+0x0/0x110
> Oct 25 16:32:45 n8 kernel: [1554039.839370]  [worker_thread+0x0/0x110] 
> worker_thread+0x0/0x110
> Oct 25 16:32:45 n8 kernel: [1554039.839403]  [kthread+0x4b/0x80] 
> kthread+0x4b/0x80
> Oct 25 16:32:45 n8 kernel: [1554039.839438]  [child_rip+0xa/0x12] 
> child_rip+0xa/0x12
> Oct 25 16:32:45 n8 kernel: [1554039.839476]  
> [lapic_next_event+0x0/0x10] lapic_next_event+0x0/0x10
> Oct 25 16:32:45 n8 kernel: [1554039.839512]  [kthread+0x0/0x80] 
> kthread+0x0/0x80
> Oct 25 16:32:45 n8 kernel: [1554039.839543]  [child_rip+0x0/0x12] 
> child_rip+0x0/0x12
> Oct 25 16:32:45 n8 kernel: [1554039.839575]
> Oct 25 16:32:45 n8 kernel: [1554039.839598]
> Oct 25 16:32:45 n8 kernel: [1554039.839599] Code: 48 8b 80 58 02 00 00 
> c3 66 2e 0f 1f 84 00 00 00 00 00 8b 47
> Oct 25 16:32:45 n8 kernel: [1554039.839716] RIP  [<ffffffff88472a7e>] 
> :ocfs2:ocfs2_get_dentry_osb+0xe/0x20
> Oct 25 16:32:45 n8 kernel: [1554039.839761]  RSP <ffff810414811ca8>
> Oct 25 16:32:45 n8 kernel: [1554039.840184] ---[ end trace 
> 7b4f7c37a3752d22 ]---
> Oct 25 16:33:14 n8 kernel: [1554069.382728] o2net: connection to node 
> n3 (num 3) at 172.16.16.203:7777 has been idle for 30.0 seconds, 
> shutting it down.
>
>
> ------------------------------------------------------------------------
>
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