Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261244AbUCZUt4 (ORCPT ); Fri, 26 Mar 2004 15:49:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264128AbUCZUt4 (ORCPT ); Fri, 26 Mar 2004 15:49:56 -0500 Received: from mx1.redhat.com ([66.187.233.31]:8090 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S261244AbUCZUtt (ORCPT ); Fri, 26 Mar 2004 15:49:49 -0500 Subject: Re: Fw: potential /dev/urandom scalability improvement From: Arjan van de Ven Reply-To: arjanv@redhat.com To: Andrew Morton Cc: davidm@hpl.hp.com, davidm@napali.hpl.hp.com, davej@redhat.com, mpm@selenic.com, linux-kernel@vger.kernel.org In-Reply-To: <20040326123303.7a775b02.akpm@osdl.org> References: <20040325141923.7080c6f0.akpm@osdl.org> <20040325224726.GB8366@waste.org> <16483.35656.864787.827149@napali.hpl.hp.com> <20040325180014.29e40b65.akpm@osdl.org> <20040326110619.GA25210@redhat.com> <16484.29095.842735.102236@napali.hpl.hp.com> <20040326104904.59f7a156.akpm@osdl.org> <16484.37279.839961.375027@napali.hpl.hp.com> <20040326123303.7a775b02.akpm@osdl.org> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-XAWaaF3hjxHz6oEfpvG7" Organization: Red Hat, Inc. Message-Id: <1080333938.7033.0.camel@laptop.fenrus.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-7) Date: Fri, 26 Mar 2004 21:45:38 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1015 Lines: 34 --=-XAWaaF3hjxHz6oEfpvG7 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > a) execute a prefetch at addresses which are not PREFETCH_STRIDE-aligned > and, as a consequence, >=20 > b) prefetch data from the next page, outside the range of the user's > (addr,len). well if you assume that cachelines (and prefetch stride) are proper divisors of PAGE_SIZE is that still true ? --=-XAWaaF3hjxHz6oEfpvG7 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQBAZJZxxULwo51rQBIRAnnrAJwJ2lnrZMogBQC7emol4+GEaqs7PgCfYkKA itbLHMZb7SdjjmPyaGnNC+k= =M6qC -----END PGP SIGNATURE----- --=-XAWaaF3hjxHz6oEfpvG7-- - 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/