Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754366AbZJEUc6 (ORCPT ); Mon, 5 Oct 2009 16:32:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752897AbZJEUc6 (ORCPT ); Mon, 5 Oct 2009 16:32:58 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:45995 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754156AbZJEUc5 (ORCPT ); Mon, 5 Oct 2009 16:32:57 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Tomasz Chmielewski Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.32-rc3: low mem - only 378MB on x86_32 with 64GB. Why? In-Reply-To: Your message of "Mon, 05 Oct 2009 21:42:09 +0200." <4ACA4C11.9060107@wpkg.org> From: Valdis.Kletnieks@vt.edu References: <4ACA4C11.9060107@wpkg.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1254774707_3393P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Mon, 05 Oct 2009 16:31:47 -0400 Message-ID: <168769.1254774707@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 128.173.35.168 turing-police.cc.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Mirapoint-IP-Reputation: reputation=neutral-1, source=Fixed, refid=n/a, actions=MAILHURDLE SPF TAG X-Junkmail-Info: (0) X-Junkmail-Status: score=10/50, host=vivi.cc.vt.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A020208.4ACA57B6.005D,ss=1,fgs=0, ip=0.0.0.0, so=2009-07-29 21:33:33, dmn=2009-09-10 00:05:08, mode=multiengine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1392 Lines: 38 --==_Exmh_1254774707_3393P Content-Type: text/plain; charset=us-ascii On Mon, 05 Oct 2009 21:42:09 +0200, Tomasz Chmielewski said: > > Heh. You've really squeezed yourself into a bad situation. Go get a > > 64-bit kernel... please. You should be able to run 32-bit userspace > > with a 64-bit kernel. Do you have some 32-bit kernel component that you > > are relying on? > > Note that in such setups (64 bit kernels and 32 bit userspace) *some* > software will not work correctly (perhaps it's limited to tightly > kernel-userspace integrated software). > > One example is open-iscsi - you won't run 32 bit open-iscsi userspace on > a 64 bit kernel (at least it was impossible a couple of months ago). Sounds like somebody blew it on 32/64 bit combatability on a syscall, most likely a parameter to an ioctl? --==_Exmh_1254774707_3393P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFKylezcC3lWbTT17ARArceAKCfOtk4q0lQKT93wLGJH/iAYgaGHgCeINjT SYolbs76Fy8uc/HV+17THYc= =PXHM -----END PGP SIGNATURE----- --==_Exmh_1254774707_3393P-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/