From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49010) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKcCy-0006KG-Lq for qemu-devel@nongnu.org; Tue, 05 Jul 2016 22:05:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bKcCw-0008MC-LL for qemu-devel@nongnu.org; Tue, 05 Jul 2016 22:04:59 -0400 References: <1466465969-25315-1-git-send-email-eblake@redhat.com> <20160622055441.GB22636@ad.usersys.redhat.com> From: Eric Blake Message-ID: <577C6741.4060804@redhat.com> Date: Tue, 5 Jul 2016 20:04:49 -0600 MIME-Version: 1.0 In-Reply-To: <20160622055441.GB22636@ad.usersys.redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="RkDfx3nRpAHPmI8FDWBFU1RLNQAiCnX6N" Subject: Re: [Qemu-devel] [PATCH 0/5] Auto-fragment large transactions at the block layer List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Fam Zheng Cc: qemu-devel@nongnu.org, kwolf@redhat.com, qemu-block@nongnu.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --RkDfx3nRpAHPmI8FDWBFU1RLNQAiCnX6N From: Eric Blake To: Fam Zheng Cc: qemu-devel@nongnu.org, kwolf@redhat.com, qemu-block@nongnu.org Message-ID: <577C6741.4060804@redhat.com> Subject: Re: [Qemu-devel] [PATCH 0/5] Auto-fragment large transactions at the block layer References: <1466465969-25315-1-git-send-email-eblake@redhat.com> <20160622055441.GB22636@ad.usersys.redhat.com> In-Reply-To: <20160622055441.GB22636@ad.usersys.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 06/21/2016 11:54 PM, Fam Zheng wrote: > On Mon, 06/20 17:39, Eric Blake wrote: >> We have max_transfer documented in BlockLimits, but while we >> honor it during pwrite_zeroes, we were blindly ignoring it >> during pwritev and preadv, leading to multiple drivers having >> to implement fragmentation themselves. This series moves >> fragmentation to the block layer, then fixes the NBD driver to >> use it; if you like this but it needs a v2, you can request that >> I further do other drivers (I know at least iscsi and qcow2 do >> some self-fragmenting and/or error reporting that can be >> simplified by deferring fragmentation to the block layer). >> >> Prequisite: Kevin's block branch, plus my work on byte-based >> block limits (v2 at the moment): >> https://lists.gnu.org/archive/html/qemu-devel/2016-06/msg04006.html >> >> Also available as a tag at: >> git fetch git://repo.or.cz/qemu/ericb.git nbd-fragment-v1 >=20 > Patches 1-6: >=20 > Reviewed-by: Fam Zheng ping - series still applies to latest master without tweaks --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --RkDfx3nRpAHPmI8FDWBFU1RLNQAiCnX6N 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 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJXfGdBAAoJEKeha0olJ0Nq0KYH/2CrjADRTSrdPp4nfSw3QZIG I2tXsSIs40swoO2jwknO3DkN99lhYuuegyPg+gUqUB93u3pewt/NorgQfFWCgRNZ zeFLGwt35aMbz59R54lnz0kAoDr7Axz99xjFRI6jKSkEmcg3s5RnwfMDtliE7LRY 8Cn3ebaAvLgUbz2UZGMmiW6ppQYgn8iX/Ry+FIv3xX3ADEDgl4jjS1X/fBA8zt0h cIGEhKjv8xdUeDOg/T8HxS1rNPtGTadv+sMRK6uUvw3vNTxx2iXBvOlLsaGc4Pxj HGOW1aOCLV8bUjcoMOtvp8VGLIeLGgQJk0wLEElzhlaiOADeV0VKSnzAcfEg5nM= =eTb2 -----END PGP SIGNATURE----- --RkDfx3nRpAHPmI8FDWBFU1RLNQAiCnX6N--