From: David Gibson <david@gibson.dropbear.id.au>
To: Greg Kurz <groug@kaod.org>
Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org,
"Laurent Vivier" <lvivier@redhat.com>,
"Cédric Le Goater" <clg@kaod.org>,
"Suraj Jitindar Singh" <sjitindarsingh@gmail.com>,
"Bharata B Rao" <bharata@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] [PATCH 0/3] spapr: fix backward migration from POWER9 to POWER8 hosts
Date: Fri, 4 May 2018 10:11:02 +1000 [thread overview]
Message-ID: <20180504001102.GH13229@umbus.fritz.box> (raw)
In-Reply-To: <152538217073.223014.17347204768561945420.stgit@bahia.lan>
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On Thu, May 03, 2018 at 11:16:10PM +0200, Greg Kurz wrote:
> Hi,
>
> It is expected to be able to migrate a guest started with
>
> -machine max-cpu-compat=power8
>
> from a POWER9 host to a POWER8 host. It works with recent QEMU versions,
> but it is badly broken if the destination runs QEMU 2.7 or older.
>
> 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.
>
> This series was lightly tested, but the patches are simple enough, so I'm
> confident they shouldn't break anything :)
>
> Please review as I'd like these to go to QEMU 2.11.2 as well.
Applied to ppc-for-2.13. As you say, these should probably go to the
2.12 and 2.11 stable trees too.
--
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
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next prev parent reply other threads:[~2018-05-04 1:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-03 21:16 [Qemu-devel] [PATCH 0/3] spapr: fix backward migration from POWER9 to POWER8 hosts Greg Kurz
2018-05-03 21:16 ` [Qemu-devel] [PATCH 1/3] target/ppc: always set PPC_MEM_TLBIE in pre 2.8 migration hack Greg Kurz
2018-05-04 0:12 ` David Gibson
2018-05-04 5:54 ` Greg Kurz
2018-05-04 6:01 ` David Gibson
2018-05-03 21:16 ` [Qemu-devel] [PATCH 2/3] spapr: don't migrate "spapr_option_vector_ov5_cas" to pre 2.8 machines Greg Kurz
2018-05-03 21:16 ` [Qemu-devel] [PATCH 3/3] spapr: don't advertise radix GTSE if max-compat-cpu < power9 Greg Kurz
2018-05-04 0:11 ` David Gibson [this message]
2018-05-04 5:58 ` [Qemu-devel] [PATCH 0/3] spapr: fix backward migration from POWER9 to POWER8 hosts Greg Kurz
2018-05-04 6:37 ` David Gibson
2018-05-04 7:01 ` Greg Kurz
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