From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755538Ab2LLSI3 (ORCPT ); Wed, 12 Dec 2012 13:08:29 -0500 Received: from mga09.intel.com ([134.134.136.24]:41905 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755134Ab2LLSI1 (ORCPT ); Wed, 12 Dec 2012 13:08:27 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,267,1355126400"; d="asc'?scan'208";a="232908588" Date: Wed, 12 Dec 2012 20:09:04 +0200 From: "Kirill A. Shutemov" To: Joonsoo Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] mm: introduce numa_zero_pfn Message-ID: <20121212180904.GA21909@otc-wbsnb-06> References: <1355331819-8728-1-git-send-email-js1304@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="azLHFNyN32YCQGCU" Content-Disposition: inline In-Reply-To: <1355331819-8728-1-git-send-email-js1304@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --azLHFNyN32YCQGCU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 13, 2012 at 02:03:39AM +0900, Joonsoo Kim wrote: > Currently, we use just *one* zero page regardless of user process' node. > When user process read zero page, at first, cpu should load this > to cpu cache. If node of cpu is not same as node of zero page, loading > takes long time. If we make zero pages for each nodes and use them > adequetly, we can reduce this overhead. >=20 > This patch implement basic infrastructure for numa_zero_pfn. > It is default disabled, because it doesn't provide page coloring and > some architecture use page coloring for zero page. Do you have benchmark numbers? --=20 Kirill A. Shutemov --azLHFNyN32YCQGCU Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJQyMhAAAoJEAd+omnVudOMPT0QAKSyz4YV0qNR9W71xQGBT6Z6 JsRgBvuVf9ukcFFjvqhS5Ax1PmdWDfWdhxcvYPHlfdYHDHl18S6rba9A15po2+sC 4Uz51Ac3BnXI+BK6A53fqHfnL/+QKNzLlmDcrYRE1V1QOxezQhTnC3K3O3L+3kyv wmpKK2dL8YKe/pg7+bgWHmad4n3uW4LE+wUsqfX022SgaGL8oxPwGkr6G1EkBaZG eQOj3DNRzj2bwzg9rQ2n9PP+wc58CzbmAvJvB6QO1Nycs7ALH8iVeXYJGWkjPCdV iIP5or7xFTSWb6OQL2uq0e9WvHRHIgMC6HMrB9wjJ0QzYsnIMbWb509ElIudpt7+ bYAxpqSY6DD/6pBPIBB7Upd1bKZnAJU7MgrpofQtUpoHfP2LET3L5g7Ny+UXcUMX U36Jj7WJmUzTmkKfMXU04z2oz9BJmZU63KRpHdoHZzmsaZx8bEaO+NC/pBQqwIDq 2l+ODIFSNPchy6XGzM/jCv+5m4+gC2mWg5YpWxQFKnGIxvz0fbGDm2K+TlV2LygH NkhvdiEL2IFxdsC2HQs5DOp1BPOC0lJM+kVlz1j8YJvpn/MPZByvJDL+JD+ddsUk m7rPAFB+C4jKohWOcaD7CcPa1h29V3Q2JL+teN9Xc8cqttu3ayUlbEEq8zD7dfUN p/jCUX1hZZZNRHx9L/H7 =w9qF -----END PGP SIGNATURE----- --azLHFNyN32YCQGCU--