Re: [Xen-devel] [PATCH 00/12] add per-domain and per-cpupool generic parameters

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 18.09.18 at 08:02, <jgross@xxxxxxxx> wrote:
> Instead of using binary hypervisor interfaces for new parameters of
> domains or cpupools this patch series adds support for generic text
> based parameter parsing.
> 
> Parameters are defined via new macros similar to those of boot
> parameters. Parsing of parameter strings is done via the already
> existing boot parameter parsing function which is extended a little
> bit.
> 
> Parameter settings can either be specified in configuration files of
> domains or cpupools, or they can be set via new xl sub-commands.

Without having looked at any of the patches yet (not even their
descriptions) I'm still wondering what the benefit of textual parameters
really is: Just like "binary" ones, they become part of the public
interface, and hence subsequently can't be changed any more or
less than the ones we currently have (in particular, anything valid in
a guest config file will imo need to remain to be valid and meaningful
down the road).

If this is solely or mainly about deferring the parsing from the tool
stack to the hypervisor, then I'm not at all convinced of the approach
(I'd even be tempted to call it backwards).

Jan



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