From owner-freebsd-current Wed Sep 2 05:56:39 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id FAA13096 for freebsd-current-outgoing; Wed, 2 Sep 1998 05:56:39 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from ns1.yes.no (ns1.yes.no [195.119.24.10]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id FAA13084 for ; Wed, 2 Sep 1998 05:56:33 -0700 (PDT) (envelope-from eivind@bitbox.follo.net) Received: from bitbox.follo.net (bitbox.follo.net [195.204.143.218]) by ns1.yes.no (8.9.1a/8.9.1) with ESMTP id OAA16230; Wed, 2 Sep 1998 14:55:06 +0200 (CEST) Received: (from eivind@localhost) by bitbox.follo.net (8.8.8/8.8.6) id OAA00620; Wed, 2 Sep 1998 14:55:06 +0200 (MET DST) Message-ID: <19980902145445.24306@follo.net> Date: Wed, 2 Sep 1998 14:54:45 +0200 From: Eivind Eklund To: Bruce Evans Cc: current@FreeBSD.ORG Subject: Re: ELF binaries size References: <199809020750.RAA15197@godzilla.zeta.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89.1i In-Reply-To: <199809020750.RAA15197@godzilla.zeta.org.au>; from Bruce Evans on Wed, Sep 02, 1998 at 05:50:31PM +1000 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, Sep 02, 1998 at 05:50:31PM +1000, Bruce Evans wrote: > >I think Bruce is mistaking the dual mapping for a single mapping, > >on the theory that in a unified VM and buffer cache, there can be > >only one instance of a page hung off the VP. > > Nah. The dual mapping is precisely what costs a full page of real memory. Does this mean we have two copies instead of two mappings? If we had dual mapping only, we shouldn't be wasting anything beyond address space and mapping-entries, which is much less precious than actual physical memory pages... Or am I missing something that should be obvious here? Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message