Subject: Re: cp(1) vs. UVM/UBC
To: Ignatios Souvatzis <>
From: Matthias Scheler <>
List: tech-userlevel
Date: 07/21/2001 07:54:33
On Fri, Jul 20, 2001 at 10:52:42PM +0200, Ignatios Souvatzis wrote:
> > We could always have the file system itself fail the mmap in the interim,
> > if need be, until it is in fact fixed.  Not all filesystems necessarily
> > *must* support mmap; just return -1 and an errno, and let smart code fall
> > back.  8-)
> how does it do it?

He is talking about smart userland code. "cp" e.g. would simply use the
old read(2) loop in this case.

	Kind regards

Matthias Scheler