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Date: Tue, 10 Apr 2007 12:44:59 -0500
From: Eric Anderson <anderson@freebsd.org>
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To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
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Cc: current@freebsd.org
Subject: Re: panic: lockmgr: locking against myself
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On 04/10/07 05:57, Dag-Erling Smørgrav wrote:
> I've been getting quite a few of these lately:
[..snip..]
> panic: lockmgr: locking against myself
[..snip..]
> (kgdb) where
> #0  doadump () at pcpu.h:172
> During symbol reading, Incomplete CFI data; unspecified registers at 0xc05301f7.
> #1  0xc053096e in boot (howto=0x104) at /usr/src/sys/kern/kern_shutdown.c:409
> #2  0xc053043b in panic (fmt=0x0) at /usr/src/sys/kern/kern_shutdown.c:563
> #3  0xc05225fb in _lockmgr (lkp=0xcf55e278, flags=0x3002, interlkp=0xcf55e278, td=0xc5235870,
>     file=0xc86e248a "/usr/src/sys/modules/nfsserver/../../nfsserver/nfs_serv.c", line=0xac9)
>     at /usr/src/sys/kern/kern_lock.c:448
> #4  0xc0594392 in vop_stdlock (ap=0x0) at /usr/src/sys/kern/vfs_default.c:266
> #5  0xc06a70df in _VOP_LOCK_APV (vop=0x0, a=0xf4643860) at vnode_if.c:1617
> #6  0xc05abb06 in _vn_lock (vp=0xcf55e220, flags=0x1002, td=0xc5235870,
>     file=0xc86e248a "/usr/src/sys/modules/nfsserver/../../nfsserver/nfs_serv.c", line=0xac9)
>     at vnode_if.h:850
> #7  0xc86d33df in nfsrv_symlink (nfsd=0xcfd7fb00, slp=0x0, td=0xc5235870, mrq=0xf4643bfc)
>     at /usr/src/sys/modules/nfsserver/../../nfsserver/nfs_serv.c:2761
> #8  0xc86e10a8 in nfssvc (td=0xc5235870, uap=0xca2f6b80)
>     at /usr/src/sys/modules/nfsserver/../../nfsserver/nfs_syscalls.c:477
> #9  0xc069437f in syscall (frame=0xf4643d38) at /usr/src/sys/i386/i386/trap.c:1008
> #10 0xc067f1c0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
> #11 0x00000033 in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> 
> DES


Can you describe your setup a bit?  Also, do you know which symlink 
triggers it?


Eric