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Re: [libvirt] [Qemu-devel] [PATCH v2] vl.c: Support multiple CPU ranges on -numa option



Eduardo Habkost <ehabkost redhat com> writes:

> On Wed, Feb 27, 2013 at 04:57:15PM +0100, Paolo Bonzini wrote:
>> Il 27/02/2013 16:42, Anthony Liguori ha scritto:
>> > There's such thing as list support in QemuOpts.  The only way
>> > QemuOptsVisitor was able to implement it was to expose QemuOpts publicly
>> > via options_int.h and rely on a implementation detail.
>> > 
>> > There are fixed types supported by QemuOpts.  It just so happens that
>> > whenever qemu_opt_set() is called, instead of replacing the last
>> > instance, the value is either prepended or appended in order to
>> > implement a replace or set-if-unset behavior.
>> 
>> Fair enough.  Nobody said the implementation is pretty.
>> 
>> > If we want to have list syntax, we need to introduce first class support
>> > for it.  Here's a simple example of how to do this.
>> 
>> If it is meant as a prototype only, and the final command-line syntax
>> would be with repeated keys, that's okay.  I think that Eduardo/Markus/I
>> are focusing on the user interface, you're focusing in the implementation.
>> 
>> In the meanwhile, however, it seems to me that Eduardo can use
>> QemuOptsVisitor---which can also hide the details and provide type safety.
>
> Whatever I use to implement it, I still need to know how the
> command-line syntax will look like, because we need to tell libvirt
> developers how they should write the QEMU command-line.

Command line syntax is not committed until it appears in a release.
libvirt *should not* assume any specific syntax until the 1.5 release
ships.

Regards,

Anthony Liguori

>
> -- 
> Eduardo


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