From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: [PATCH] memory: synchronize dirty bitmap before unmapping a range Date: Mon, 01 Aug 2011 09:34:48 +0200 Message-ID: <4E365718.2060500@web.de> References: <1312141678-5141-1-git-send-email-avi@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig4327D8828A54D6B1A9943258" Cc: Anthony Liguori , qemu-devel@nongnu.org, kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from fmmailgate01.web.de ([217.72.192.221]:35625 "EHLO fmmailgate01.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751891Ab1HAHey (ORCPT ); Mon, 1 Aug 2011 03:34:54 -0400 In-Reply-To: <1312141678-5141-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig4327D8828A54D6B1A9943258 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable On 2011-07-31 21:47, Avi Kivity wrote: > When a range is being unmapped, ask accelerators (e.g. kvm) to synchron= ize the > dirty bitmap to avoid losing information forever. >=20 > Fixes grub2 screen update. I does. But something is still broken. As I reported before, the performance of grub2 startup is an order of magnitude slower than with the existing code. According to ftrace, we are getting tons of additional EPT_MISCONFIG exits over the 0xA0000 segment. But I haven't spot the difference yet. The effective slot setup as communicated to kvm looks innocent. Jan --------------enig4327D8828A54D6B1A9943258 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk42VxwACgkQitSsb3rl5xRgjQCgz5lYrMaff5FEJbbEMlCWzB21 MsUAnAp9xh/KVKMO0paVHJBCJiUaMvAJ =cRBU -----END PGP SIGNATURE----- --------------enig4327D8828A54D6B1A9943258--