From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36065) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cvOug-0006QS-4s for qemu-devel@nongnu.org; Tue, 04 Apr 2017 09:54:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cvOud-0003fJ-34 for qemu-devel@nongnu.org; Tue, 04 Apr 2017 09:54:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54984) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cvOuc-0003eu-O6 for qemu-devel@nongnu.org; Tue, 04 Apr 2017 09:54:23 -0400 Date: Tue, 4 Apr 2017 15:54:14 +0200 From: Kevin Wolf Message-ID: <20170404135414.GC4536@noname.str.redhat.com> References: <9b05e60a-f8c2-ea4f-6be4-f17c0adec510@redhat.com> <20170403081542.GA5036@noname.str.redhat.com> <20170403125148.GX26598@andariel.pipo.sk> <20170404131902.GB4536@noname.str.redhat.com> <20170404132705.GE26598@andariel.pipo.sk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="B4IIlcmfBL/1gGOG" Content-Disposition: inline In-Reply-To: <20170404132705.GE26598@andariel.pipo.sk> Subject: Re: [Qemu-devel] nbd: Possible regression in 2.9 RCs List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Krempa Cc: Max Reitz , Ciprian Barbu , "qemu-devel@nongnu.org" , Eric Blake , Alexandru Avadanii , Jeff Cody , Markus Armbruster , svc-armband --B4IIlcmfBL/1gGOG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Am 04.04.2017 um 15:27 hat Peter Krempa geschrieben: > On Tue, Apr 04, 2017 at 15:19:02 +0200, Kevin Wolf wrote: > > Am 03.04.2017 um 14:51 hat Peter Krempa geschrieben: > > > On Mon, Apr 03, 2017 at 10:15:42 +0200, Kevin Wolf wrote: > > > > Am 31.03.2017 um 19:43 hat Max Reitz geschrieben: > > > > > On 31.03.2017 18:03, Ciprian Barbu wrote: >=20 > [...] >=20 > > > > Peter, Eric, what is the status on the libvirt side here? > > >=20 > > > Libvirt currently uses the NBD server only for non-shared storage > > > migration. At that point the disk is not shared (while qemu may think > > > so) since the other side is not actually running until the mirror > > > reaches synchronized state. > >=20 > > Yes, I misunderstood the situation at first. > >=20 > > Anyway, is there already a libvirt patch for the cases where the image > > is actually shared? >=20 > As said, we use the nbd server only for migration. There's no other > usage I know of and thus no patch. I mean two VMs sharing the same image file, and both expose it as a guest device. The situation for which we discussed before that libvirt needs to pass share-rw=3Don. I understand that this isn't related to this report, but I want to make sure that it's not forgotten. Kevin --B4IIlcmfBL/1gGOG Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJY46WGAAoJEH8JsnLIjy/WdD0P/10xh6ngPQE0Wn4x7JtgwEwh hAOJOMfJ7V3hcbUVDnp00rVJc636cXpTUXLyX6OtNDGlOrMOXBBJ01UqLrcqkdUX rMMsp2urMScG9WLiEm7YF9BYdvtIUL70EXS1ro1RbFw/aXpsfC8VdG1ZfVvi4Vt4 6GCV39O71n1KkP9HD5897vArox+4DZa8XzfNcxB8aNkXthstpvDm3+OAXJt24nuL uRPIwc8i8nTIhdhb2GfHBRgP4e6UESR5RHilmQpPRAkcGg38PJGnoArUiBgDiMSG JcBWhNk4gFGneWJ4jwMkh2oSzvITh08mFboBbwbxMhoEP7xvUQSpnz26FdHlJhnh iI0iA5akxkz7+OMTd62LjhyVcS85PPyjWHQoWZS3lErOmnukQ+KbyvaqvHP8kSpw PCotWIIDcHUvgmcsfdxNsoke+CWlIQ8tG6sEJW/iqOfQ5DdtwVktMI1Gl6M7Yj4f ZSeDfvLYnGmlLWYCAm02obaAh++8t5Ce8ZYkaEi/fLdDSajHF1WS/5q+FhyDXGEY tJ5bFdqLoxRP9BgrfsrfhK7a3PvUm7NWhqYobMAzQzWpNPQ84LSreIVmLXq34Mab aT6YjJDafGo9lXv2gCIJoYrGzoIIZrArA93lDV7r4Z1hRGmZqXaCto5EKBvjuy+q sFQV0njgUvWu9oLLk1Ru =B1JR -----END PGP SIGNATURE----- --B4IIlcmfBL/1gGOG--