From owner-cvs-all@FreeBSD.ORG  Fri Jun 20 03:47:53 2003
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 7972C37B401; Fri, 20 Jun 2003 03:47:53 -0700 (PDT)
Received: from is1.mh.itc.u-tokyo.ac.jp (is1.mh.itc.u-tokyo.ac.jp
	[133.11.205.11])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 7FD9943FBD; Fri, 20 Jun 2003 03:47:49 -0700 (PDT)
	(envelope-from simokawa@sat.t.u-tokyo.ac.jp)
Received: from is1.mh.itc.u-tokyo.ac.jp (is1.mh.itc.u-tokyo.ac.jp [127.0.0.1])
	by is1.mh.itc.u-tokyo.ac.jp (Postfix) with ESMTP
	id 28823218120; Fri, 20 Jun 2003 19:47:47 +0900 (JST)
Received: from mailhosting.itc.u-tokyo.ac.jp
	(IDENT:mirapoint@mailhosting.itc.u-tokyo.ac.jp [133.11.205.3])
	h5KAlk3V018712;	Fri, 20 Jun 2003 19:47:46 +0900
Received: from ett.sat.t.u-tokyo.ac.jp (ett.sat.t.u-tokyo.ac.jp
	[133.11.135.3])3.3.5-GR)	with ESMTP id AIZ89389;
	Fri, 20 Jun 2003 19:47:45 +0900 (JST)
Date: Fri, 20 Jun 2003 19:47:45 +0900
Message-ID: <ybsr85pqb3i.wl@ett.sat.t.u-tokyo.ac.jp>
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
To: Doug Rabson <dfr@nlsystems.com>
In-Reply-To: <200306201002.24956.dfr@nlsystems.com>
References: <200306191214.h5JCEcjg028827@repoman.freebsd.org>
	<20030619190204.B74362A7EA@canning.wemm.org>
	<ybs1xxpsj4n.wl@ett.sat.t.u-tokyo.ac.jp>
	<200306201002.24956.dfr@nlsystems.com>
User-Agent: Wanderlust/2.11.0 (Wonderwall) REMI/1.14.3 (Matsudai)
 FLIM/1.14.3 (=?ISO-8859-1?Q?Unebigory=F2mae?=) APEL/10.3 MULE XEmacs/21.4
 (patch 8) (Honest Recruiter) (i386--freebsd)
X-Face: OE([KxWyJI0r[R~S/>7ia}SJ)i%a,$-9%7{*yihQk|]gl}2p#"oXmX/fT}Bn7:
 #j7i14gu$jgR\S*&C3R/pJX<mI-4Z8'mqt1R'CjWdw-xqVoilv`\JgZcquM5oV
 uO^<vt/~051rCDM(`{rM~?{Okr,XC+}Ycm9IJO)odT*-0nyJjBJYzL{GsZ
MIME-Version: 1.0 (generated by REMI 1.14.3 - "Matsudai")
Content-Type: text/plain; charset=US-ASCII
cc: Hidetoshi Shimokawa <simokawa@FreeBSD.org>
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
cc: Peter Wemm <peter@wemm.org>
cc: cvs-src@FreeBSD.org
Subject: Re: cvs commit: src/sys/amd64/amd64 pmap.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 Jun 2003 10:47:53 -0000

At Fri, 20 Jun 2003 10:02:24 +0100,
Doug Rabson wrote:
> 
> 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.

It makes sense. Amd64 has direct-mapped region on -1TB space.
I'll look into the code of alpha/ia64.

Thanks,

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html