From owner-cvs-src@FreeBSD.ORG  Fri Jun 20 02:02:30 2003
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id BC11437B401; Fri, 20 Jun 2003 02:02:30 -0700 (PDT)
Received: from herring.nlsystems.com (mailgate.nlsystems.com [62.49.251.130])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id CF9C743FBF; Fri, 20 Jun 2003 02:02:28 -0700 (PDT)
	(envelope-from dfr@nlsystems.com)
Received: from herring.nlsystems.com (herring.nlsystems.com [10.0.0.2])
	by herring.nlsystems.com (8.12.9/8.12.8) with ESMTP id h5K92Pwa030780;
	Fri, 20 Jun 2003 10:02:25 +0100 (BST)
	(envelope-from dfr@nlsystems.com)
From: Doug Rabson <dfr@nlsystems.com>
To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>,
	Peter Wemm <peter@wemm.org>
Date: Fri, 20 Jun 2003 10:02:24 +0100
User-Agent: KMail/1.5
References: <200306191214.h5JCEcjg028827@repoman.freebsd.org>
	<20030619190204.B74362A7EA@canning.wemm.org>
	<ybs1xxpsj4n.wl@ett.sat.t.u-tokyo.ac.jp>
In-Reply-To: <ybs1xxpsj4n.wl@ett.sat.t.u-tokyo.ac.jp>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200306201002.24956.dfr@nlsystems.com>
X-Spam-Status: No, hits=-22.9 required=6.0
	tests=EMAIL_ATTRIBUTION,IN_REP_TO,REFERENCES,REPLY_WITH_QUOTES,
	      USER_AGENT
	version=2.50
X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp)
cc: Hidetoshi Shimokawa <simokawa@FreeBSD.org>
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
cc: cvs-src@FreeBSD.org
Subject: Re: cvs commit: src/sys/amd64/amd64 pmap.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 Jun 2003 09:02:31 -0000

On Friday 20 June 2003 1:11 am, Hidetoshi Shimokawa wrote:
> At Thu, 19 Jun 2003 12:02:04 -0700,
>
> Peter Wemm wrote:
> > >   Modified files:
> > >     sys/amd64/amd64      pmap.c
> > >   Log:
> > >   Fix direct map page table for 2GB+ physical memory.
> >
> > Thank you! :-)
> >
> > Cheers,
> > -Peter
>
> Do you have any plan to increase KVA up to 512GB?
> struct vm_page consumes 250MB space for 8GB memory.

Is there a direct-mapped region on amd64? The vm_page arrays come out of 
the direct-mapped regions on alpha and ia64 (don't know about sparc64) 
and this makes a big difference to KVA usage and probably to TLB 
pressure too.

-- 
Doug Rabson				Mail:  dfr@nlsystems.com
					Phone: +44 20 8348 6160