From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36335) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxfbU-0005A5-Bi for qemu-devel@nongnu.org; Thu, 19 Jun 2014 12:54:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WxfbO-0006ep-Hu for qemu-devel@nongnu.org; Thu, 19 Jun 2014 12:54:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33424) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxfbO-0006ei-8W for qemu-devel@nongnu.org; Thu, 19 Jun 2014 12:54:18 -0400 Message-ID: <53A315B6.4020607@redhat.com> Date: Thu, 19 Jun 2014 10:54:14 -0600 From: Eric Blake MIME-Version: 1.0 References: <20140619091716.GS21236@stefanha-thinkpad.redhat.com> <20140619162600.GB6096@localhost.localdomain> <53A314B0.9030508@redhat.com> In-Reply-To: <53A314B0.9030508@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="oKqlRhwgjew7IW34EJJkFfnx9lmU8Fca3" Subject: Re: [Qemu-devel] [PATCH v6 for 2.1 00/10] Modify block jobs to use node-names List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jeff Cody , Stefan Hajnoczi Cc: kwolf@redhat.com, benoit.canet@irqsave.net, pkrempa@redhat.com, famz@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --oKqlRhwgjew7IW34EJJkFfnx9lmU8Fca3 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 06/19/2014 10:49 AM, Eric Blake wrote: > if qemu allows shared BDS, and I am able to open 'base' as a shared BDS= > for both disks, then an attempt to block-commit img1 into base will be > blocked because base is still in use by img2. But as a management app,= > I shouldn't be attempting that in the first place. Yes, it would be > nice if qemu blocks me from being stupid; but even if qemu allows share= d > BDS, if I don't open a shared BDS on 'base' in the first place, it is n= o > different than if qemu doesn't allow shared BDS. Either way, it's not > qemu's fault if I, as management, try to commit into a file that is in > use by more than one chain. >=20 That's what I meant to say, >=20 > if I am not able to do a shared BDS, I'm still > and as the management, I did not request that qemu open 'base' as a > shared BDS between both and this was leftover ramblings that I was experimenting with, but forgot to delete once I had the paragraph above the way I liked it. Sorry for any confusion. --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --oKqlRhwgjew7IW34EJJkFfnx9lmU8Fca3 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 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJToxW2AAoJEKeha0olJ0NqztMH/3gvtJk2v79E4ttOoiaJMKeD 9JmqN6OKsS04xCrbp2mDdM4gVyRJCaa52Rz2HhZ5j6MwztFclyFleUTiL3Fid3Rt 31XR7/TZlj7PcigkEv2IIkOrOeW1RXb6KMxNUaP2I0n0yfr8dWcPUOtPTOb/RwjM VvrAgNxLronol5yj9TGSBjCKSB73fMu4HTg/DIE45ghomJN7tiCDJ9Dk3sYoiSNG 9qSweJ05sXhqHF4Q9QD3u6lumPpX2vCh4PHBBqoODkXDiJLkchZL0WGLtE9rcrEy 5Cbmkqg50CkHHpG2vigHuOlqnYednv0ZKNa87KNdiTa/Ss7SozAPnXx3XFDbkG4= =CdEB -----END PGP SIGNATURE----- --oKqlRhwgjew7IW34EJJkFfnx9lmU8Fca3--