RHEL 5 system suffers multiple panics/reboots with Veritas vxfs

Issue

System suffered multiple panics over the course of a couple of days. Latest vmcore revealed vxfs was stuck waiting on something.

NMI Watchdog detected LOCKUP on CPU 40
CPU 40 
Modules linked in: nfs nfs_acl vxodm(PFU) autofs4 dmpjbod(PU) dmpap(PU) dmpaa(PU) vxspec(PFU) vxio(PFU) vxdmp(PU) lockd sunrpc bonding ipv6 xfrm_nalgo crypto_api cpufreq_ondemand acpi_cpufreq freq_table mperf vxportal(PFU) fdd(PFU) vxfs(PU) exportfs dm_mirror dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev qla2xxx cdc_ether i2c_i801 tpm_tis sg ide_cd bnx2 tpm usbnet i2c_core i7core_edac tpm_bios scsi_transport_fc cdrom pcspkr edac_mc dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache usb_storage ata_piix libata shpchp megaraid_sas sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 2033, comm: osh Tainted: PF    ---- 2.6.18-274.12.1.el5 #1
RIP: 0010:[<ffffffff80064bd8>]  [<ffffffff80064bd8>] .text.lock.spinlock+0xe/0x30
RSP: 0018:ffff811d6e9e7620  EFLAGS: 00000086
RAX: 0000000000000296 RBX: ffff81307e785000 RCX: 0000000000000800
RDX: ffff811a852c3bc0 RSI: ffff8119e3505d40 RDI: ffff81307d538318
RBP: 0000000000000000 R08: 0000000000008000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8119e3505d40
R13: ffff81307d5382c0 R14: ffff81207fb0a000 R15: ffff8119e3505d40
FS:  00002ac4ab475ec0(0000) GS:ffff81207ff8dac0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000379009a830 CR3: 0000001d7587c000 CR4: 00000000000006a0
Process osh (pid: 2033, threadinfo ffff811d6e9e6000, task ffff811d7587b7e0)
Stack:  ffffffff8850767c ffff811a852c3bc0 ffff81207fb0a000 0000000000000001
 0000000000000001 000000016e9e7908 0000000000000800 0000000000000000
 ffff8119e3505d40 ffff811d6e9e7898 ffff81207fb0a000 0000000000000800
Call Trace:
 [<ffffffff8850767c>] :vxfs:vx_extentalloc_delicache+0x34/0x556
 [<ffffffff8850c0d5>] :vxfs:vx_extentalloc+0x490/0x7d4
 [<ffffffff8000f470>] __alloc_pages+0x78/0x308
 [<ffffffff8852b439>] :vxfs:vx_bmap_ext4+0x292/0x646
 [<ffffffff88528f71>] :vxfs:vx_bmap_alloc+0x1f4/0x292
 [<ffffffff885e7509>] :vxfs:vx_mkimtran+0x208/0x2da
 [<ffffffff885702ea>] :vxfs:vx_write_alloc3+0x2aa/0x907
 [<ffffffff885709d4>] :vxfs:vx_tran_write_alloc+0x8d/0x9c
 [<ffffffff8856fd79>] :vxfs:vx_write_alloc2+0x55/0x70
 [<ffffffff8867f107>] :vxfs:vx_write_alloc+0x27e/0x31f
 [<ffffffff88682847>] :vxfs:vx_write1+0x712/0xd63
 [<ffffffff8862e1ba>] :vxfs:vx_uiomove+0x588/0x5ca
 [<ffffffff8003bb71>] remove_wait_queue+0x1c/0x2c
 [<ffffffff88683e06>] :vxfs:vx_write_common_slow+0x553/0xb91
 [<ffffffff88528941>] :vxfs:vx_bmap_cache_check+0x99/0xeb
 [<ffffffff88529121>] :vxfs:vx_bmap_lookup+0x112/0x334
 [<ffffffff88684851>] :vxfs:vx_write_common+0x328/0x396
 [<ffffffff8862f7bd>] :vxfs:vx_vop_write+0x14/0x19
 [<ffffffff8863349e>] :vxfs:vx_write+0x21b/0x274
 [<ffffffff80016b92>] vfs_write+0xce/0x174
 [<ffffffff8001745b>] sys_write+0x45/0x6e
 [<ffffffff8005d116>] system_call+0x7e/0x83