Panic: pagein mfind in 4.3BSD + NFS on mvII

[Augh]

We have 4 micro-vax II's running 4.3BSD + NFS from Mt. Xinu, on 2 of the
machine(different peripherals) I am getting panic: pagein mfind.
To this point I have been unable to track a probable cause for this
problem as it happens with seemingly random timing. Has any one else seen
this problem, and does anyone have a hint as to how to get a handle
on the problem?

Brian Sturgill
ukma!cbosgd!brian