Server crashed with gfs2_glock_put from glock_workqueue process

Issue

• A vmcore is generated by the function: gfs2_glock_put

last sysfs file: /sys/kernel/dlm/vg0004-lv32/event_done
CPU 54 
Modules linked in: ptlpfc(U) lpfc(U) ptmem(U) gfs2 dlm configfs sctp libcrc32c nfs lockd fscache nfs_acl auth_rpcgss sunrpc iptable_filter ip_tables autofs4 ipmi_devintf ipmi_si ipmi_msghandler bonding 8021q garp stp llc ipv6 dm_round_robin qla2xxx scsi_transport_fc scsi_tgt sg cdc_ether usbnet mii microcode serio_raw i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support shpchp ioatdma i7core_edac edac_core igb dca bnx2 ext3 jbd mbcache sr_mod cdrom usb_storage sd_mod crc_t10dif pata_acpi ata_generic ata_piix megaraid_sas dm_multipath dm_mirror dm_region_hash dm_log dm_mod [last unloaded: lpfc]

Pid: 79481, comm: glock_workqueue Tainted: G        W 
---------------   
2.6.32-279.el6.x86_64 #1 IBM System x3850 X5 -[7143B6G]-/Node 1, Processor Card
RIP: 0010:[<ffffffffa06711d8>]  [<ffffffffa06711d8>] gfs2_glock_put+0xb8/0x180 [gfs2]
RSP: 0018:ffff880859807dd0  EFLAGS: 00010246
RAX: ffffffffa069c1b0 RBX: ffff8818474fb8f0 RCX: dead000000200200
RDX: 0000000000000000 RSI: ffffffffa069bf94 RDI: ffffffffa069bf94
RBP: ffff880859807df0 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8818474fba88
R13: ffff8818474ae000 R14: 0000000000000000 R15: ffff8818474fb91c
FS:  0000000000000000(0000) GS:ffff88089c780000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007fe96df85c30 CR3: 0000000e2da6d000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process glock_workqueue (pid: 79481, threadinfo ffff880859806000, task ffff8808597fe080)
Stack:
 ffff880859807df0 ffff8818474fb8f0 0000000000000000 ffff8818474fb9e8
<d> ffff880859807e30 ffffffffa0673dc8 ffffe8efff5915c8 ffffe8efff5915c0
<d> ffffe8efff5915c0 ffffffffa0673cb0 ffff880859807fd8 ffffe8efff5915c8
Call Trace:
 [<ffffffffa0673dc8>] glock_work_func+0x118/0x1b0 [gfs2]
 [<ffffffffa0673cb0>] ? glock_work_func+0x0/0x1b0 [gfs2]
 [<ffffffff8108c760>] worker_thread+0x170/0x2a0
 [<ffffffff810920d0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8108c5f0>] ? worker_thread+0x0/0x2a0
 [<ffffffff81091d66>] kthread+0x96/0xa0
 [<ffffffff8100c14a>] child_rip+0xa/0x20
 [<ffffffff81091cd0>] ? kthread+0x0/0xa0
 [<ffffffff8100c140>] ? child_rip+0x0/0x20
Code: ff 00 66 66 90 8b 43 34 48 8d 04 c5 c0 bf 69 a0 f0 0f ba 28 00 19 d2 85 d2 75 73 f6 c3 01 48 8b 13 48 8b 4b 08 0f 85 bb 00 00 00 <48> 8b 01 83 e0 01 48 09 d0 48 85 d2 48 89 01 74 04 48 89 4a 08 
RIP  [<ffffffffa06711d8>] gfs2_glock_put+0xb8/0x180 [gfs2]
 RSP <ffff880859807dd0>