From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51792) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEULW-0007s1-VB for qemu-devel@nongnu.org; Fri, 04 May 2018 02:37:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fEULV-0005gc-W6 for qemu-devel@nongnu.org; Fri, 04 May 2018 02:37:35 -0400 Date: Fri, 4 May 2018 16:37:19 +1000 From: David Gibson Message-ID: <20180504063719.GC13229@umbus.fritz.box> References: <152538217073.223014.17347204768561945420.stgit@bahia.lan> <20180504001102.GH13229@umbus.fritz.box> <20180504075821.0e0cbdc6@bahia.lan> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="j6Ejlva3tMw3xXYi" Content-Disposition: inline In-Reply-To: <20180504075821.0e0cbdc6@bahia.lan> Subject: Re: [Qemu-devel] [PATCH 0/3] spapr: fix backward migration from POWER9 to POWER8 hosts List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Greg Kurz Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org, Laurent Vivier , =?iso-8859-1?Q?C=E9dric?= Le Goater , Suraj Jitindar Singh , Bharata B Rao , qemu-stable@nongnu.org --j6Ejlva3tMw3xXYi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, May 04, 2018 at 07:58:21AM +0200, Greg Kurz wrote: > On Fri, 4 May 2018 10:11:02 +1000 > David Gibson wrote: >=20 > > On Thu, May 03, 2018 at 11:16:10PM +0200, Greg Kurz wrote: > > > Hi, > > >=20 > > > It is expected to be able to migrate a guest started with > > >=20 > > > -machine max-cpu-compat=3Dpower8 > > >=20 > > > from a POWER9 host to a POWER8 host. It works with recent QEMU versio= ns, > > > but it is badly broken if the destination runs QEMU 2.7 or older. > > >=20 > > > This can cause problems in cloud environments that still have systems= with > > > older QEMU versions, eg, hosts running ubuntu LTS 16.04.4 (QEMU 2.5) = which > > > are likely to stay around until admins could transition to some newer= OS. > > >=20 > > > This series was lightly tested, but the patches are simple enough, so= I'm > > > confident they shouldn't break anything :) > > >=20 > > > Please review as I'd like these to go to QEMU 2.11.2 as well. =20 > >=20 > > Applied to ppc-for-2.13. As you say, these should probably go to the > > 2.12 and 2.11 stable trees too. > >=20 >=20 > Cc'ing qemu-stable then Thanks. I'm about to go on leave, so I won't be around to shepherd these into the stable trees any time soon. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson --j6Ejlva3tMw3xXYi Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEdfRlhq5hpmzETofcbDjKyiDZs5IFAlrr/58ACgkQbDjKyiDZ s5KosRAAr7reOHHn3cfcpTdhXR0RsoikTci8KqfyxMe2TYWyONjGnxyB2w4Sm5X8 DWSAFaI8wVI/hceQH7sT+erO6qPBXKYy8mIJTWUO0iXBA/nYv899OqPtNRHBmYaN quskF7xRO13CadrHo4sOlRQgrnzc4NEsHEryZa9CF5ZBVkAtp8FmIWhvdNx/GLNq hA0nzmvHHJ+9fpA1hRwg4IVMWn+UdelWEndG2UuHAufO6XhxwnHfyJMQKex0BGQt z4R7/myeAAaIYaszmlEhcam3iZByB5SEuW2vlJcYzlj87tNqfKgW5nMaDUMS7ADi WqFBes+p8Gcq1iU+I1i5KcuMQ2SV6fPrqTue4uqufMRwqdkeM5tFGALQXUtts+il lFeR7DSmhiHP8MgiOvUlDFICgkjHeBMmju3S6+HqGrI/nQYqjHtMsdYtijO2g0zg jMSUBQB2xMlYbwCOfitKtkNyddKol0y+NfTvaY6bQvZq7xlhTF9deLdKOrB3i/IR 40SDpbEKo7gWWVW75Wba2UUPTLFV4fQtv2v1NdJhqhSjtGw/WhuedRvfkF2mMMhr Gxz6qe0nxgX1hHzVc9Q4MNL+lm0V85LCRFRhkXIwuoSDRQCIWNClbTQyP1OsgM1b Eyg15oIyMcNIxT/5pnPCHPZZGY25hWzbn2iqFMFdOn/xObrWtyM= =ZlJF -----END PGP SIGNATURE----- --j6Ejlva3tMw3xXYi--