From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35523) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V09q6-0003dz-Av for qemu-devel@nongnu.org; Fri, 19 Jul 2013 08:31:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V09q5-0008H9-7h for qemu-devel@nongnu.org; Fri, 19 Jul 2013 08:31:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34882) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V09q4-0008H4-V9 for qemu-devel@nongnu.org; Fri, 19 Jul 2013 08:31:13 -0400 Message-ID: <51E9318B.1060007@redhat.com> Date: Fri, 19 Jul 2013 06:31:07 -0600 From: Eric Blake MIME-Version: 1.0 References: <1373992168-26043-1-git-send-email-pbonzini@redhat.com> <1373992168-26043-2-git-send-email-pbonzini@redhat.com> In-Reply-To: <1373992168-26043-2-git-send-email-pbonzini@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="V8qBC364S9OTMfjaNqo6VWD6kRNg53Xvc" Subject: Re: [Qemu-devel] [PATCH v2 01/17] cow: make reads go at a decent speed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: famz@redhat.com, pl@kamp.de, qemu-devel@nongnu.org, stefanha@redhat.com This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --V8qBC364S9OTMfjaNqo6VWD6kRNg53Xvc Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 07/16/2013 10:29 AM, Paolo Bonzini wrote: > Do not do two reads for each sector; load each sector of the bitmap > and use bitmap operations to process it. >=20 > Writes are still dog slow! >=20 > Signed-off-by: Paolo Bonzini > --- > v1->v2: use BDRV_SECTOR_SIZE, not 512 for bitmap array length >=20 > block/cow.c | 54 ++++++++++++++++++++++++++++++++---------------------= - > 1 file changed, 32 insertions(+), 22 deletions(-) >=20 Reviewed-by: Eric Blake --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --V8qBC364S9OTMfjaNqo6VWD6kRNg53Xvc Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJR6TGLAAoJEKeha0olJ0Nq3f4IAIN9+1InQSQ198MdliNppyLQ jIM7xR/SLKsj/UxQ+1bWTnCDS7rR+kfdLaNkn0bnHhcavOGaXyaDNQSI97htzfkD 7ChtfKJi8RHuaX3j8eximVfOhz6o2s5/xFD+v6RorKmVAHi+OYsCqH4xFIFO8rI+ 0nNaiX8Y6rjHWigXFUngxNXt+ew3eQqe5sof87R4VoAEjR5B+D536xd7QJXl70au PYzjTG0F3zKyzzX+f9+TU5eMm4AHWfu2o4mYtgQorLkLLBalwE+2t1wrRd/q+jgH Mpi/E5Mjf1JLmy3iuA9j11NXW1eCa7zI/S5hblU9jGbQvEzYBXlycMzy0+Ua038= =3nJX -----END PGP SIGNATURE----- --V8qBC364S9OTMfjaNqo6VWD6kRNg53Xvc--