[no subject]

[RWK at MIT-MC (Robert W. Kerns)]

I think it SHOULD do caching (like I had it doing before) when it finds
it is not writable, with the hashing scheme.

Certainly I did not forget that a page which is PUREP may or may not be
writtablep.  That should be obvious, since the bug I was complaining about
was the GC problem.