From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266574AbUHXGvb (ORCPT ); Tue, 24 Aug 2004 02:51:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266569AbUHXGv1 (ORCPT ); Tue, 24 Aug 2004 02:51:27 -0400 Received: from mx1.redhat.com ([66.187.233.31]:40079 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S266527AbUHXGvW (ORCPT ); Tue, 24 Aug 2004 02:51:22 -0400 Subject: Re: [patch] lazy TSS's I/O bitmap copy ... From: Arjan van de Ven Reply-To: arjanv@redhat.com To: Davide Libenzi Cc: Linux Kernel Mailing List , Andy Kleen , Andrew Morton , Linus Torvalds In-Reply-To: References: Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-1DZAkUvceXIR/HGTOQ1u" Organization: Red Hat UK Message-Id: <1093330271.2792.3.camel@laptop.fenrus.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Tue, 24 Aug 2004 08:51:12 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-1DZAkUvceXIR/HGTOQ1u Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Mon, 2004-08-23 at 23:23, Davide Libenzi wrote: > The following patch implements a lazy I/O bitmap copy for the i386=20 > architecture. With I/O bitmaps now reaching considerable sizes, if the=20 > switched task does not perform any I/O operation, we can save the copy=20 > altogether. In my box X is working fine with the following patch, even if= =20 > more test would be required. the thing is that X will not hit your fault path, since it runs with iopl() called... your patch is a nice optimisation for X as a result, however as test, X is almost worthless ;( --=-1DZAkUvceXIR/HGTOQ1u Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQBBKuVfxULwo51rQBIRArIhAJwNuogwxTErHBKj3oSQ0lfZdRdybQCff3tU 3DlQ4zrhFBEWIW0ulsn1WCU= =RxZh -----END PGP SIGNATURE----- --=-1DZAkUvceXIR/HGTOQ1u--