Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64

From: Li Zhang <zhlcindy@gmail.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Peter Maydell <peter.maydell@linaro.org>,
	libvir-list@redhat.com,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	Alexey Kardashevskiy <aik@au1.ibm.com>,
	Paul Mackerras <paulus@au1.ibm.com>,
	Pradipta Kumar Banerjee <bpradip@in.ibm.com>
Subject: Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64
Date: Wed, 22 May 2013 23:26:38 +0800	[thread overview]
Message-ID: <519CE3AE.6070301@gmail.com> (raw)
In-Reply-To: <87sj1gt843.fsf@codemonkey.ws>

On 2013年05月22日 04:01, Anthony Liguori wrote:
> "Daniel P. Berrange" <berrange@redhat.com> writes:
>
>> On Tue, May 21, 2013 at 11:12:26AM -0600, Eric Blake wrote:
>>> I have also argued in the past that it would be useful for libvirt to
>>> support the idea of a template, where you can specify a domain XML that
>>> inherits defaults from the template.  We've already done things like
>>> this for networking, nwfilter, and even secret management (in domain
>>> XML, you declare that you are using a named network object, and that
>>> network object serves as the template instead of you having to hard-code
>>> all the elements into your domain XML), so we have a design to base it
>>> on.  But until someone adds such a feature for libvirt, then OpenStack
>>> should be passing explicit XML to libvirt, and tracking defaults at the
>>> OpenStack layer.
>> I don't think the idea of a template belongs in libvirt.
> This is fine.  But the conversation started with a statement that it's
> QEMU's job to define reasonable defaults and libvirt just exposes
> those.
>
> But in QEMU, we punt this problem by letting a user globally override
> this default.  libvirt hides this ability from the end user.
>
> So either it's libvirt's problem to solve, or you should expose the
> ability to set the global setting within QEMU.  We can't just point our
> fingers at each other and hope the problem goes away :-)

Hi Anthony,

Currently, to resolve this problem, can we set 'pseries' as default?
Because mac99 doesn't work at all on our platform.

Thanks. :)
-- Li

>
> Regards,
>
> Anthony Liguori
>
>> Creating basic
>> XML structure with relevant defaults pre-filled for a particular usecase
>> is something that the libvirt-designer library is aiming to take care of
>> for applications.
>>
>> Daniel
>> -- 
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