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From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>,
	Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel.a@redhat.com>,
	Laszlo Ersek <lersek@redhat.com>,
	qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
	Igor Mammedov <imammedo@redhat.com>, John Snow <jsnow@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v2 0/5] q35: Remove old machines and unused compat code
Date: Thu, 11 Feb 2016 21:49:53 +0100	[thread overview]
Message-ID: <56BCF3F1.9080807@redhat.com> (raw)
In-Reply-To: <20160211183032-mutt-send-email-mst@redhat.com>



On 11/02/2016 17:33, Michael S. Tsirkin wrote:
>> They won't start unless the QEMU command-line is changed, because
>> they are using a feature QEMU won't support anymore. Why is that
>> a problem?
> 
> We don't support installing one machine type, then switching.

Uhm, we definitely support people using qemu directly with no -M option
at all with installed VMs.  That's the same as switching machine types
every time a new QEMU is released.

At least RHEV supports switching machine types, even RHEL6->RHEL7.
There are constraints on when to do that because it affects the whole
datacenter, but it is done routinely because each RHEV release only
supports two machine types IIRC.

Paolo

  parent reply	other threads:[~2016-02-11 20:50 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-23 16:02 [Qemu-devel] [PATCH v2 0/5] q35: Remove old machines and unused compat code Eduardo Habkost
2016-01-23 16:02 ` [Qemu-devel] [PATCH v2 1/5] q35: Remove old machine versions Eduardo Habkost
2016-01-23 16:02 ` [Qemu-devel] [PATCH v2 2/5] machine: Remove no_tco field Eduardo Habkost
2016-01-23 16:02 ` [Qemu-devel] [PATCH v2 3/5] ich9: Remove enable_tco arguments from init functions Eduardo Habkost
2016-01-23 16:02 ` [Qemu-devel] [PATCH v2 4/5] q35: Remove unused q35-acpi-dsdt.aml file Eduardo Habkost
2016-01-23 16:02 ` [Qemu-devel] [PATCH v2 5/5] q35: No need to check gigabyte_align Eduardo Habkost
2016-01-25 11:27 ` [Qemu-devel] [PATCH v2 0/5] q35: Remove old machines and unused compat code Laszlo Ersek
2016-01-26 10:15   ` Igor Mammedov
2016-01-26 14:49     ` Laszlo Ersek
2016-01-26 10:17 ` Igor Mammedov
2016-01-26 14:59 ` [Qemu-devel] [PATCH 6/5] pc: Remove unused pc_acpi_init() function Eduardo Habkost
2016-01-26 17:27   ` Laszlo Ersek
2016-01-26 14:59 ` [Qemu-devel] [PATCH 7/5] acpi: Remove unused acpi_table_add_builtin() function Eduardo Habkost
2016-01-26 17:27   ` Laszlo Ersek
2016-01-27 17:08   ` Igor Mammedov
2016-02-04 16:01 ` [Qemu-devel] [PATCH v2 0/5] q35: Remove old machines and unused compat code Michael S. Tsirkin
2016-02-04 17:16   ` Eduardo Habkost
2016-02-04 18:02     ` Michael S. Tsirkin
2016-02-04 19:09       ` Eduardo Habkost
2016-02-04 22:14         ` Michael S. Tsirkin
2016-02-05  9:09           ` Markus Armbruster
2016-02-05 14:46           ` Eduardo Habkost
2016-02-06 18:34             ` Michael S. Tsirkin
2016-02-11 15:51               ` Eduardo Habkost
2016-02-11 16:33                 ` Michael S. Tsirkin
2016-02-11 17:24                   ` Eduardo Habkost
2016-02-11 20:49                   ` Paolo Bonzini [this message]
2016-02-11 20:49                   ` Paolo Bonzini
2016-02-12 10:58                   ` Markus Armbruster
2016-02-18 11:18                     ` Markus Armbruster
2016-02-18 12:07                       ` Michael S. Tsirkin
2016-02-18 12:46                         ` Markus Armbruster
2016-02-05  8:55       ` Markus Armbruster
2016-02-07 10:17         ` Michael S. Tsirkin
2016-02-08 11:59           ` Markus Armbruster
2016-02-18 12:39 ` Markus Armbruster
2016-02-18 23:17   ` Eduardo Habkost
2016-02-19  8:29     ` Markus Armbruster
2016-02-23 13:00 ` Michael S. Tsirkin

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