From owner-freebsd-stable@FreeBSD.ORG  Tue Dec 18 06:57:46 2007
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Date: Tue, 18 Dec 2007 08:57:45 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
Message-ID: <E1J4WOf-000DUM-CO@cs1.cs.huji.ac.il>
Subject: unionfs lock problems
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with 7.0-Beta4, I'm getting quiet a few of these:

lockmgr: thread 0xffffff00039269f0 unlocking unheld lock
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_lockmgr() at _lockmgr+0x6ae
VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x46
unionfs_unlock() at unionfs_unlock+0x22f
VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x46
vn_read() at vn_read+0x264
dofileread() at dofileread+0xa1
kern_readv() at kern_readv+0x4c
read() at read+0x54
syscall() at syscall+0x254
Xfast_syscall() at Xfast_syscall+0xab
--- syscall (3, FreeBSD ELF64, read), rip = 0x80187b18c, rsp = 0x7fffffffafb8, 
rbp = 0x7fffffffb045 ---

danny