Unstable NFS on recent CURRENT

[Ronald Klop]

On Sun, 06 Mar 2016 02:57:03 +0100, Paul Mather <paul at gromit.dlib.vt.edu>  
wrote:

> On my BeagleBone Black running 11-CURRENT (r296162) lately I have been  
> having trouble with NFS.  I have been doing a buildworld and buildkernel  
> with /usr/src and /usr/obj mounted via NFS.  Recently, this process has  
> resulted in the buildworld failing at some point, with a variety of  
> errors (Segmentation fault; Permission denied; etc.).  Even a "ls -alR"  
> of /usr/src doesn't manage to complete.  It errors out thus:
>
> =====
> [[...]]
> total 0
> ls: ./.svn/pristine/fe: Permission denied
>
> ./.svn/pristine/ff:
> total 0
> ls: ./.svn/pristine/ff: Permission denied
> ls: fts_read: Permission denied
> =====
>
> On the console, I get the following:
>
> newnfs: server 'chumby.chumby.lan' error: fileid changed. fsid  
> 94790777:a4385de: expected fileid 0x4, got 0x2. (BROKEN NFS SERVER OR  
> MIDDLEWARE)
>
>
> I am using a FreeBSD/amd64 10.3-PRERELEASE (r296412) as the NFS server.   
> On the BeagleBone Black, I am mounting /usr/src and /usr/obj via  
> /etc/fstab as follows:
>
> chumby.chumby.lan:/build/src/head /usr/src nfs rw,nfsv4 0 0
> chumby.chumby.lan:/build/obj/bbb /usr/obj nfs rw,nfsv4 0 0
>
>
> /build/src/head and /build/obj/bbb are both ZFS file systems.
>
> Has anyone else encountered this?  It has only started happening  
> recently for me, it seems.  Prior to this, I have been able to do a  
> buildworld and buildkernel successfully over NFS.
>
> Cheers,
>
> Paul.

I cc this to freebsd-fs for you.

Ronald.