From owner-freebsd-hackers Tue Nov 27 13:53:38 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from relay3-gui.server.ntli.net (relay3-gui.server.ntli.net [194.168.4.200]) by hub.freebsd.org (Postfix) with ESMTP id 140C637B42A for ; Tue, 27 Nov 2001 13:52:45 -0800 (PST) Received: from pc3-card4-0-cust122.cdf.cable.ntl.com ([62.254.251.122] helo=rhadamanth.private.submonkey.net ident=exim) by relay3-gui.server.ntli.net with esmtp (Exim 3.03 #2) id 168q9i-0004Bw-00; Tue, 27 Nov 2001 21:52:42 +0000 Received: from setantae by rhadamanth.private.submonkey.net with local (Exim 3.33 #1) id 168q9d-0004OI-00; Tue, 27 Nov 2001 21:52:37 +0000 Date: Tue, 27 Nov 2001 21:52:36 +0000 From: setantae To: =?iso-8859-1?Q?G=E9rard?= Roudier Cc: Andrey Pugachev , freebsd-hackers@FreeBSD.ORG Subject: Re: Does FreeBSD support copy-on-write pages? Message-ID: <20011127215236.GA16727@rhadamanth> References: <20011127190515.GA15358@rhadamanth> <20011127182404.F2369-100000@gerard> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20011127182404.F2369-100000@gerard> User-Agent: Mutt/1.3.23.2i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, Nov 27, 2001 at 06:31:31PM +0100, Gérard 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. Ceri -- keep a mild groove on To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message