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From: Dmitry Khrustalev <dima@bog.msu.su>
To: hackers@freefall.FreeBSD.ORG
cc: hasty@rah.star-gate.com
Subject: Re: NFS crash
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> Has anyone seen this problem?
> 
> > I have a problem with nfs mounting a freebsd machine from a Sun. I 
> > have set it up just like it says FreeBSD handbook. It lets the Sun 
> > mount the freeBSD drive. It lets me cd to the mount point, but when I 
> > do a "ls", the freeBSD machine crashes. Have you ever seen this 
> > problem? Please give me a call.
> > The errorthat is left on the bsd machine before it crashes is: Panic: 
> > ufs_ihashget:recursive lock not expected -- pid86 
> 

Yes. solaris 2.5 uses readdirplus and it is broken in freebsd.
Look at VOP_VGET in nfs_serv.c:2913. 

	-Dima.