Panic on my NFS server: Consumer with zero access count in g_dev_strategy

[Poul-Henning Kamp]

In message <1061037457.23643.53.camel at sauna.arved.de>, Tilman Linneweh writes:
>Hi,
>
>Today I did something stupid. I umount'ed a filesystem of my NFS Server,
>while an NFS client was writing to it.

This is a pretty evil bug, the panic correctly stops UFS/FFS from
writing to the disk device after it has been closed.  I am not sure
how this is possible, the mountpoint should be long gone etc.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.