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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 4 Jun 2018 14:35:25 +0200
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Subject: Re: [Qemu-devel] [PATCH RFC] hw/pc: set q35 as the default x86
 machine
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To: Igor Mammedov <imammedo@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, rth@twiddle.net, qemu-devel@nongnu.org, ehabkost@redhat.com

On 04/06/2018 14:24, Igor Mammedov wrote:
>> Yes it's easy to add -machine pc but there's no documentation
>> that tells you to do so. Add to that shortcuts like -cdrom
>> stop working, hotplug needs extra bridges to work, and one
>> can see that while management tool users benefit from q35,
>> command line users will suffer.
> Maybe we should mark 'pc' default as deprecated first,
> like we do with CLI options that we wish to drop in future?
> 
> That way we 'create' documentation, so users would be aware
> of the change and have time to fix their CLI if they prefer
> 'pc' machine.

Michael has listed reasons why 'pc' cannot be deprecated, since some of
them are not even fixable.  Honestly, 'pc' works well for 99% of the use
cases---just like you probably don't care whether your laptop has a PCI
or PCIe chipset.

Paolo