Deadlock on NFS server

[Francois Tigeot]

I just got a new sort of deadlock on a NFS server.

During the extraction of a tarball archive by a FreeBSD client, the server
became unresponsive.

It could still answer to pings but all other sort of network activity failed.
Ssh sessions were hanged, there was no answer to telnet commands, etc...

On the console there was a single message:

	Warning, objcache(mbuf pkt hdr): Exhausted!

I could switch virtual terminals with ALT-F1 and so. The keyboard appeared at
first to function as usual: I could enter a user name and a password but as
soon as I pressed enter for the second time, the machine hanged for good.

I was able to obtain a crash dump by escaping to the debuger with
ctrl-alt-esc. The files are available here:

http://www.wolfpond.org/crash.dfly/

-- 
Francois Tigeot