From owner-freebsd-hackers@FreeBSD.ORG Tue Dec 8 14:08:42 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B7D231065695 for ; Tue, 8 Dec 2009 14:08:42 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 044AF8FC16 for ; Tue, 8 Dec 2009 14:08:41 +0000 (UTC) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id QAA28873; Tue, 08 Dec 2009 16:08:36 +0200 (EET) (envelope-from avg@icyb.net.ua) Message-ID: <4B1E5DE4.1010702@icyb.net.ua> Date: Tue, 08 Dec 2009 16:08:36 +0200 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.23 (X11/20091206) MIME-Version: 1.0 To: Mel Flynn References: <237c27100911260714x2fcb194ew1e6ce11e764efd08@mail.gmail.com> <867htduvwh.fsf@ds4.des.no> <237c27100911260911w2674b79ds8ac447e900324dce@mail.gmail.com> <200912071620.03371.mel.flynn+fbsd.hackers@mailing.thruhere.net> In-Reply-To: <200912071620.03371.mel.flynn+fbsd.hackers@mailing.thruhere.net> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@freebsd.org, Linda Messerschmidt Subject: Re: Superpages on amd64 FreeBSD 7.2-STABLE X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Dec 2009 14:08:42 -0000 on 07/12/2009 17:20 Mel Flynn said the following: > b) vfork is encouraged for memory intensive applications, yet: > BUGS > This system call will be eliminated when proper system sharing mechanisms > are implemented. Users should not depend on the memory sharing semantics > of vfork() as it will, in that case, be made synonymous to fork(2). > > So is this entire problem eliminated when system sharing mechanisms are in > place and vfork considered the temporary work around or is copying of > superpages a problem that remains? I think no :) This section is either already removed or is going to be. -- Andriy Gapon