On Tue, 27 Nov 2001, setantae wrote:
> On Tue, Nov 27, 2001 at 06:31:31PM +0100, G�rard Roudier wrote:
> >
> >
> > On Tue, 27 Nov 2001, setantae wrote:
> >
> > > On Tue, Nov 27, 2001 at 06:54:17PM -0000, Andrey Pugachev wrote:
> > > > I am just curious, can FreeBSD kernel perform function called copy-on-write?
> > >
> > > As far as I am aware, the BSD family of operating systems have always
> > > used copy-on-write (at least since 4.3BSD).
> >
> > My awareness is different and tells me that 4.3BSD had just vfork() but
> > not COW yet, while System V had it years before. Sorry if I am wrong.
>
> You're not. My bad.
> At home now, and checking my daemon book I see SystemV, Release 2 got it in
> 1984, and it was introduced in 4.4BSD in 1993.
I was remembering from such a book I have had for reading a couple a years
ago. :)
The COW comes from the complex :) Mach VM. So FreeBSD have had COW (at
least in theory) years before 1993 and actually not after Win/NT, since
the first mostly running Win/NT release may well have been the Beta-March
93.
G�rard.
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