From owner-freebsd-amd64@FreeBSD.ORG Sat Oct 9 06:45:18 2010 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C48561065674 for ; Sat, 9 Oct 2010 06:45:18 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id 33C1B8FC16 for ; Sat, 9 Oct 2010 06:45:17 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id o996jCU4027241 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 9 Oct 2010 09:45:12 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id o996jBqC050517; Sat, 9 Oct 2010 09:45:11 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id o996jB0j050516; Sat, 9 Oct 2010 09:45:11 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Sat, 9 Oct 2010 09:45:11 +0300 From: Kostik Belousov To: Steve Kargl Message-ID: <20101009064511.GV2392@deviant.kiev.zoral.com.ua> References: <20101008221701.GA89977@troutmask.apl.washington.edu> <20101008222013.GT2392@deviant.kiev.zoral.com.ua> <20101008231210.GA90183@troutmask.apl.washington.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="DXai+D0O/pduKrS9" Content-Disposition: inline In-Reply-To: <20101008231210.GA90183@troutmask.apl.washington.edu> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-3.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-amd64@freebsd.org Subject: Re: linux32 sysctl limits? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Oct 2010 06:45:18 -0000 --DXai+D0O/pduKrS9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Oct 08, 2010 at 04:12:10PM -0700, Steve Kargl wrote: > On Sat, Oct 09, 2010 at 01:20:13AM +0300, Kostik Belousov wrote: > > On Fri, Oct 08, 2010 at 03:17:01PM -0700, Steve Kargl wrote: > > > 'man linux' does not list or describe the following sysctl > > > variables. > > >=20 > > > compat.linux32.maxvmem: 0 > > > compat.linux32.maxssiz: 67108864 > > > compat.linux32.maxdsiz: 536870912 > > >=20 > > > Are there any limitations with setting these to > > > say 1G for stack and 4G for data on a system with > > > 16G of memory? > >=20 > > The linux ABI processes are 32bit, so you cannot reallistically assign > > 4Gb to maxdsiz. The space between data (bss) end and stack bottom is > > used for mappings, so it should be kept large enough. >=20 > Does this mean that maxssiz+maxdsiz=3D3G would allow=20 > 1G for mappings? The only linux app that will be > running is matlab (and I suppose any children processes > of matlab). It has a chance of working. I do not know how much is linux userland sensitive to the address space layout change. --DXai+D0O/pduKrS9 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkywD3cACgkQC3+MBN1Mb4iZlACgvAQNK4wRChMtYz6cTGbsOU8W MusAoKujmZjuwYG0p5AhnZs//NA9F8c1 =ECRR -----END PGP SIGNATURE----- --DXai+D0O/pduKrS9--