Solaris 10 System May Panic with "Deadlock: cycle in blocking chain" in port_free_event and aio_port_callback

(Doc ID 1990572.1)

Last updated on AUGUST 01, 2016

Applies to:

Solaris Operating System - Version 10 11/06 U3 to 10 1/13 U11 [Release 10.0]
Information in this document applies to any platform.
Solaris 10 System Panic with "Deadlock: cycle in blocking chain" in aio_port_callback

Symptoms

 The panic stack will look like this:

Jul 20 04:47:02 nyhshspltp35b unix: [ID 836849 kern.notice]·
Jul 20 04:47:02 nyhshspltp35b ^Mpanic[cpu60]/thread=30021b628e0:·
Jul 20 04:47:02 nyhshspltp35b unix: [ID 783603 kern.notice] Deadlock: cycle in blocking chain
Jul 20 04:47:02 nyhshspltp35b unix: [ID 100000 kern.notice]·
Jul 20 04:47:02 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d610 genunix:turnstile_block+62c (1, 61, 60105b52060, 1832d98, 0, 0)
Jul 20 04:47:02 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 000000000106a04c 0000000000000000 00000600ecdee4f8 000003001d9bcc30
Jul 20 04:47:02 nyhshspltp35b   %l4-7: 000003001c0101c0 000000000106a04c 000000000194e350 0000000000000000
Jul 20 04:47:02 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d6c0 unix:mutex_vector_enter+428 (18bad00, 2, 60105b52060, fffffe788677b3b4, 3001c0101c1, 0)
Jul 20 04:47:02 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 00000000019415d8 0000030025cafc08 0000000000000000 0000000000000000
Jul 20 04:47:02 nyhshspltp35b   %l4-7: 000003001c0101c0 0000000000000001 0000000001832dd0 0000000001832dc8
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d770 kaio:aio_port_callback+64 (60105ba4e00, 3001d9bcc30, 139d, 0, 60105bc28f0, 60105b52000)
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 0000060105b52060 000003000012a1d8 0000060105b52090 0000000000000000
Jul 20 04:47:03 nyhshspltp35b   %l4-7: 000003000012b100 00000000c3424e70 000000000000139d 000003002513b028
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d820 portfs:port_copy_event+70 (600a60835c0, 60105bc28f0, 0, c998e538, c998e580, 1)
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 00000000019415d8 0000030011a9c2e0 0000000000000001 0000000000000010
Jul 20 04:47:03 nyhshspltp35b   %l4-7: 0000000000000010 0000000000000010 000000007bf2f634 000000000000139d
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d8d0 portfs:port_getn+528 (600ed464040, 600a60835c0, 0, 2a104b9da9c, 2a104b9dab0, 60105bc28f0)
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 0000000000000018 00000600ed4640a0 0000000000000000 0000000000000001
Jul 20 04:47:03 nyhshspltp35b   %l4-7: 0000000000000000 0000000000000000 0000000000000001 00000600ed464100
Jul 20 04:47:03 nyhshspltp35b genunix: [ID 723222 kern.notice] 000002a104b9d9e0 portfs:portfs+1ac (ffffffff794fb498, d, 40, 14, 1, 1)
Jul 20 04:47:04 nyhshspltp35b genunix: [ID 179002 kern.notice]   %l0-3: 000002a104b9dab0 000002a104b9da9c 0000000000000005 00000600ed464040
Jul 20 04:47:04 nyhshspltp35b   %l4-7: 0000000000000006 0000000000000000 0000000000000005 0000000000000198
Jul 20 04:47:04 nyhshspltp35b unix: [ID 100000 kern.notice]·
Jul 20 04:47:04 nyhshspltp35b genunix: [ID 672855 kern.notice] syncing file systems...
Jul 20 04:47:07 nyhshspltp35b genunix: [ID 733762 kern.notice]  59
Jul 20 04:47:11 nyhshspltp35b genunix: [ID 733762 kern.notice]  50
Jul 20 04:47:14 nyhshspltp35b genunix: [ID 733762 kern.notice]  46
Jul 20 04:48:29 nyhshspltp35b last message repeated 20 times
Jul 20 04:48:30 nyhshspltp35b genunix: [ID 622722 kern.notice]  done


 

Cause

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