From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262490AbTFTI4L (ORCPT ); Fri, 20 Jun 2003 04:56:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262497AbTFTI4L (ORCPT ); Fri, 20 Jun 2003 04:56:11 -0400 Received: from node-d-1ea6.a2000.nl ([62.195.30.166]:13807 "EHLO laptop.fenrus.com") by vger.kernel.org with ESMTP id S262490AbTFTI4E (ORCPT ); Fri, 20 Jun 2003 04:56:04 -0400 Subject: Re: fast_copy_page sections?! From: Arjan van de Ven Reply-To: arjanv@redhat.com To: Karl Vogel Cc: "'linux-kernel@vger.kernel.org'" In-Reply-To: <6DED3619289CD311BCEB00508B8E1336011774BD@nt-server2.antwerp.seagha.com> References: <6DED3619289CD311BCEB00508B8E1336011774BD@nt-server2.antwerp.seagha.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-VOyP/Sx9oca5Q7Z4oywZ" Organization: Red Hat, Inc. Message-Id: <1056100201.1721.3.camel@laptop.fenrus.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.0 (1.4.0-2) Date: 20 Jun 2003 11:10:01 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-VOyP/Sx9oca5Q7Z4oywZ Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2003-06-20 at 10:38, Karl Vogel wrote: > In arch/i386/lib/mmx.c there is a function fast_copy_page() using some > crafty asm statements. However I don't quite understand the part with the > fixup sections?!=20 basically, if your cpu doesn't do prefetch, it will fault. The section stuff adds an exception handler for this fault that zeroes out the prefetch code so that next time there no longer is a prefetch() there. --=-VOyP/Sx9oca5Q7Z4oywZ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQA+8s9pxULwo51rQBIRArQzAJ4hKS6o2gjJ+8wdnvBFoa8z2VN2VwCZAX8z xrF4CYjmrf1ZS6Vbw/uNz30= =jgci -----END PGP SIGNATURE----- --=-VOyP/Sx9oca5Q7Z4oywZ--