From owner-freebsd-xen@FreeBSD.ORG Tue Sep 22 14:14:43 2009 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 18748106568F for ; Tue, 22 Sep 2009 14:14:43 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (skuns.zoral.com.ua [91.193.166.194]) by mx1.freebsd.org (Postfix) with ESMTP id 65D9B8FC1E for ; Tue, 22 Sep 2009 14:14:42 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id n8MEEe0g062484 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 22 Sep 2009 17:14:40 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.3/8.14.3) with ESMTP id n8MEEetD020182; Tue, 22 Sep 2009 17:14:40 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.3/8.14.3/Submit) id n8MEEel3020181; Tue, 22 Sep 2009 17:14:40 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Tue, 22 Sep 2009 17:14:40 +0300 From: Kostik Belousov To: Larry Baird Message-ID: <20090922141440.GX47688@deviant.kiev.zoral.com.ua> References: <20090922123401.GB29391@gta.com> <20090922131034.GV47688@deviant.kiev.zoral.com.ua> <20090922135914.GA44294@gta.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="BgdT6MQD5banEouU" Content-Disposition: inline In-Reply-To: <20090922135914.GA44294@gta.com> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean Cc: freebsd-xen@freebsd.org Subject: Re: XEN 5.5.0 and clflush X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Sep 2009 14:14:43 -0000 --BgdT6MQD5banEouU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 22, 2009 at 09:59:14AM -0400, Larry Baird wrote: > Kostik, >=20 > > I am sorry for delay in answering, you may use this temporal patch until > > the issue is resolved somehow. > >=20 > > I think I will have to disable CLFLUSH support for intel CPUs when self= -snoop > > is not reported. > Thanks for the feedback? Have you heard about this being a problem on > platforms other than XEN? No, and AMD should have CPUs without self-snoop, but supporting CLFLUSH. This is the main reason for this optimization came in, and no single compla= in from this problem on AMD (i.e. on native CPU, not under the hypervisor). > I am not sure how many FreeBSD users are using > XEN. If this is a large base, getting a fix in before FreeBSD 8 is > released would be nice. (-: >=20 > Larry >=20 >=20 > --=20 > ------------------------------------------------------------------------ > Larry Baird | http://www.gta.com > Global Technology Associates, Inc. | Orlando, FL > Email: lab@gta.com | TEL 407-380-0220, FAX 407-380-6080 --BgdT6MQD5banEouU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkq4288ACgkQC3+MBN1Mb4hQAACg22/9H738kk/FzKkYNkLH6fFC kesAnjFvg2Ks+aS4IDp+XPNXI9DkXHkj =Jl5X -----END PGP SIGNATURE----- --BgdT6MQD5banEouU--