Q: BSD process name corresponding to current thread: kernel_task?

The first time this happened was when i was in the middle of editing a word doc (actively typing).  The other times it was when I was away from my computer. In either case, I set the sleep setting to "Never" in case this helps.

This is what I keep getting. Thanks for any help!

Interval Since Last Panic Report:  22594 sec                                                                   

Panics Since Last Report:          1

Anonymous UUID: A2220BE1-16DB-068C-3967-DF456E07E17A

Wed Feb 12 16:05:03 2014

panic(cpu 0 caller 0xffffff802225ce27): "complete() while dma active"@/SourceCache/xnu/xnu-2050.48.12/iokit/Kernel/IOMemoryDescriptor.cpp:255 9

Backtrace (CPU 0), Frame : Return Address

0xffffff810496b9b0 : 0xffffff8021e1d636

0xffffff810496ba20 : 0xffffff802225ce27

0xffffff810496ba60 : 0xffffff7fa23d6a7c

0xffffff810496bab0 : 0xffffff7fa23cc85b

0xffffff810496bb00 : 0xffffff7fa2c1be72

0xffffff810496bb50 : 0xffffff7fa2c1f8d6

0xffffff810496bba0 : 0xffffff7fa24a31bf

0xffffff810496bbf0 : 0xffffff7fa249d186

0xffffff810496bc40 : 0xffffff7fa249d215

0xffffff810496bc70 : 0xffffff7fa251c030

0xffffff810496bd40 : 0xffffff7fa2ded6fa

0xffffff810496bde0 : 0xffffff7fa2dee4e4

0xffffff810496be20 : 0xffffff7fa2dfb7c5

0xffffff810496bed0 : 0xffffff7fa2e03517

0xffffff810496bef0 : 0xffffff8022250e58

0xffffff810496bf30 : 0xffffff802224f95a

0xffffff810496bf80 : 0xffffff802224fa89

0xffffff810496bfb0 : 0xffffff8021eb3257

      Kernel Extensions in backtrace:

com.apple.iokit.IOStorageFamily(1.8)[5BA4CD36-E96D-3A9E-ADFF-A863BBD63BC7]@0xff ffff7fa23c9000->0xffffff7fa23edfff

         com.apple.iokit.IOUSBFamily(635.4)[E67F44F7-A4BD-3CD1-A01B-B37D783CE613]@0xffff ff7fa2519000->0xffffff7fa2576fff

dependency: com.apple.iokit.IOPCIFamily(2.8)[6C1D646D-7E5E-3D7F-A557-2CBA398FF878]@0xffffff 7fa24da000

com.apple.driver.AppleUSBXHCI(635.4)[8AE1BFCB-0589-3A1D-8D8B-07B2D0526535]@0xff ffff7fa2dec000->0xffffff7fa2e08fff

dependency: com.apple.iokit.IOUSBFamily(635.4.0)[E67F44F7-A4BD-3CD1-A01B-B37D783CE613]@0xff ffff7fa2519000

dependency: com.apple.iokit.IOPCIFamily(2.8)[6C1D646D-7E5E-3D7F-A557-2CBA398FF878]@0xffffff 7fa24da000

com.apple.iokit.IOSCSIArchitectureModelFamily(3.5.6)[093058E1-DDE5-31B1-9C4F-C5 64D8E76526]@0xffffff7fa2498000->0xffffff7fa24c2fff

com.apple.iokit.IOSCSIBlockCommandsDevice(3.5.6)[75DBBA3A-97B6-36C1-B657-63FA3F C217CB]@0xffffff7fa2c1a000->0xffffff7fa2c2ffff

dependency: com.apple.iokit.IOSCSIArchitectureModelFamily(3.5.6)[093058E1-DDE5-31B1-9C4F-C5 64D8E76526]@0xffffff7fa2498000

dependency: com.apple.iokit.IOStorageFamily(1.8)[5BA4CD36-E96D-3A9E-ADFF-A863BBD63BC7]@0xff ffff7fa23c9000

BSD process name corresponding to current thread: kernel_task

Boot args: arch=x86_64

Mac OS version:

12F45

Kernel version:

Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64

Kernel UUID: EA38B02E-2B88-309F-BA68-1DE29F605DD8

Kernel slide: 0x0000000021c00000

Kernel text base: 0xffffff8021e00000

System model name: iMac13,1 (Mac-00BE6ED71E35EB86)

System uptime in nanoseconds: 7367372077462

last loaded kext at 1012032027953: com.apple.filesystems.afpfs         10.0 (addr 0xffffff7fa4301000, size 348160)

last unloaded kext at 336213480625: com.apple.filesystems.msdosfs 1.8.1 (addr 0xffffff7fa42d5000, size 57344)

loaded kexts:

1. com.parallels.kext.prl_vnic    7.0 15106.786747
2. com.parallels.kext.prl_netbridge      7.0 15106.786747
3. com.nvidia.CUDA       1.1.0
4. com.parallels.kext.prl_hid_hook       7.0 15106.786747
5. com.parallels.kext.prl_hypervisor    7.0 15106.786747
6. com.parallels.kext.prl_usb_connect  7.0 15106.786747
7. com.vara.driver.VaraAudio   1.0.3
8. com.apple.filesystems.afpfs  10.0
9. com.apple.nke.asp_tcp          7.1.0
10. com.apple.filesystems.smbfs            1.8.4
11. com.apple.driver.AppleBluetoothMultitouch         75.19
12. com.apple.iokit.IOBluetoothSerialManager            4.1.7f4
13. com.apple.driver.AppleHWSensor   1.9.5d0
14. com.apple.driver.AudioAUUC           1.60
15. com.apple.driver.X86PlatformShim            1.0.0
16. com.apple.driver.ApplePlatformEnabler    2.0.7d2
17. com.apple.driver.AGPM        100.13.12
18. com.apple.driver.AppleMikeyHIDDriver     124
19. com.apple.iokit.IOUserEthernet       1.0.0d1
20. com.apple.Dont_Steal_Mac_OS_X      7.0.0
21. com.apple.driver.ApplePolicyControl          3.4.5
22. com.apple.driver.AppleHDA 2.4.7fc4
23. com.apple.driver.AppleMikeyDriver           2.4.7fc4
24. com.apple.filesystems.autofs            3.0
25. com.apple.driver.AppleSMCLMU     2.0.3d0
26. com.apple.driver.AppleSMBusPCI   1.0.11d1
27. com.apple.driver.AppleLPC  1.6.3
28. com.apple.GeForce    8.1.6
29. com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport           4.1.7f4
30. com.apple.driver.AppleUpstreamUserClient          3.5.12
31. com.apple.driver.AppleMCCSControl          1.1.11
32. com.apple.driver.AppleIntelHD4000Graphics       8.1.6
33. com.apple.driver.AppleIntelFramebufferCapri     8.1.6
34. com.apple.iokit.IOUSBAttachedSCSI            1.0.4
35. com.apple.AppleFSCompression.AppleFSCompressionTypeDataless      1.0.0d1
36. com.apple.AppleFSCompression.AppleFSCompressionTypeZlib  1.0.0d1
37. com.apple.BootCache            34
38. com.apple.driver.XsanFilter 404
39. com.apple.iokit.IOAHCIBlockStorage           2.3.5
40. com.apple.driver.AppleSDXC           1.4.3
41. com.apple.iokit.AppleBCM5701Ethernet   3.6.2b4
42. com.apple.driver.AppleUSBHub      635.4.0
43. com.apple.driver.AppleUSBEHCI     621.4.6
44. com.apple.driver.AirPort.Brcm4331           615.20.17
45. com.apple.driver.AppleAHCIPort     2.6.6
46. com.apple.driver.AppleUSBXHCI     635.4.0
47. com.apple.driver.AppleACPIButtons           1.8
48. com.apple.driver.AppleRTC  1.5
49. com.apple.driver.AppleHPET           1.8
50. com.apple.driver.AppleSMBIOS       1.9
51. com.apple.driver.AppleACPIEC        1.8
52. com.apple.driver.AppleAPIC            1.7
53. com.apple.driver.AppleIntelCPUPowerManagementClient          214.0.0
54. com.apple.nke.applicationfirewall   4.0.39
55. com.apple.security.quarantine        2.1
56. com.apple.driver.AppleIntelCPUPowerManagement        214.0.0
57. com.apple.security.SecureRemotePassword          1.0
58. com.apple.driver.IOBluetoothHIDDriver    4.1.7f4
59. com.apple.driver.AppleMultitouchDriver   237.4
60. com.apple.iokit.IOSerialFamily         10.0.6
61. com.apple.iokit.IOSurface     86.0.4
62. com.apple.iokit.IOBluetoothFamily  4.1.7f4
63. com.apple.driver.DspFuncLib          2.4.7fc4
64. com.apple.iokit.IOAudioFamily         1.9.2fc7
65. com.apple.kext.OSvKernDSPLib      1.12
66. com.apple.driver.AppleGraphicsControl     3.4.5
67. com.apple.driver.AppleThunderboltEDMSink       1.2.0
68. com.apple.kext.triggers         1.0
69. com.apple.driver.AppleHDAController        2.4.7fc4
70. com.apple.iokit.IOHDAFamily           2.4.7fc4
71. com.apple.driver.X86PlatformPlugin          1.0.0
72. com.apple.driver.AppleSMC 3.1.5d4
73. com.apple.driver.IOPlatformPluginFamily 5.4.1d13
74. com.apple.iokit.IOBluetoothHostControllerUSBTransport            4.1.7f4
75. com.apple.driver.AppleSMBusController    1.0.11d1
76. com.apple.nvidia.gk100hal  8.1.6
77. com.apple.NVDAResman      8.1.6
78. com.apple.iokit.IOAcceleratorFamily           74.15
79. com.apple.iokit.IONDRVSupport      2.3.7
80. com.apple.iokit.IOGraphicsFamily    2.3.7
81. com.apple.iokit.IOSCSIBlockCommandsDevice       3.5.6
82. com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.6
83. com.apple.driver.AppleUSBHIDKeyboard  170.2.4
84. com.apple.driver.AppleHIDKeyboard         170.2.4
85. com.apple.driver.AppleThunderboltDPOutAdapter         2.5.0
86. com.apple.driver.AppleThunderboltDPInAdapter            2.5.0
87. com.apple.driver.AppleThunderboltDPAdapterFamily    2.5.0
88. com.apple.driver.AppleThunderboltPCIDownAdapter     1.3.2
89. com.apple.driver.AppleUSBHIDMouse        175.8
90. com.apple.iokit.IOUSBHIDDriver     623.4.0
91. com.apple.driver.AppleHIDMouse   175.8
92. com.apple.driver.AppleUSBMergeNub       621.4.6
93. com.apple.driver.AppleUSBComposite        621.4.0
94. com.apple.driver.AppleThunderboltNHI    1.9.2
95. com.apple.iokit.IOThunderboltFamily         2.7.7
96. com.apple.iokit.IOEthernetAVBController  1.0.2b1
97. com.apple.iokit.IOUSBUserClient     630.4.4
98. com.apple.iokit.IO80211Family       530.5
99. com.apple.iokit.IONetworkingFamily           3.0
100. com.apple.iokit.IOAHCIFamily          2.5.1
101. com.apple.iokit.IOUSBFamily            635.4.0
102. com.apple.driver.AppleEFINVRAM  2.0
103. com.apple.driver.AppleEFIRuntime            2.0
104. com.apple.iokit.IOHIDFamily            1.8.1
105. com.apple.iokit.IOSMBusFamily       1.1
106. com.apple.security.sandbox 220.3
107. com.apple.kext.AppleMatch 1.0.0d1
108. com.apple.security.TMSafetyNet     7
109. com.apple.driver.DiskImages           345
110. com.apple.iokit.IOStorageFamily      1.8
111. com.apple.driver.AppleKeyStore     28.21
112. com.apple.driver.AppleACPIPlatform         1.8
113. com.apple.iokit.IOPCIFamily 2.8
114. com.apple.iokit.IOACPIFamily          1.4
115. com.apple.kec.corecrypto     1.0