[TUHS] Another odd comment in V6

[Random832]

On Tue, Feb 14, 2017, at 09:18, Nick Downing wrote:
> Having a hypothetical system with a very slow disk (or fast
> CPU) in which disk accesses are blocking, would break many programs.
> cheers, Nick

That's not very hypothetical, but it is probably the reason disk access
(and even access to regular files on networked filesystems) isn't
interruptible, and non-blocking I/O useless in such situations, on some
modern systems.