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Re: [Xen-devel] [PATCH] xl: Special case tap/aio for disk validation

On Thu, 27 Jan 2011, Kamala Narasimhan wrote:
> >> Shall we pre-deprecate the someprefix: along with all the
> >> tap:{aio,ioemu,FOO}: stuff while we are at this? IOW the syntax we want
> >> to actually support going forward would be:
> >>    (raw|vhd|qcow2|qcow):/path/to/something
> >> with the toolstack being at liberty to best decide how to achieve the
> >> necessary format support? (optionally raw: as the default). All the rest
> >> of the format is really semantically meaningless and supported only for
> >> compatibility with existing configuration files.
> > 
> > Yes.
> > 
> That brings the question on what we do to make it obvious to the user that we 
> are deprecating these options.  That is other than explicitly mentioning it 
> in the documentation.  Do we display a warning in our validation code?

While fixing the disk parsing is critical for 4.1, I am not sure if we
can deprecate the current syntax for 4.1 as well.
We should keep in mind that xend is still using the other syntax and it
is still present in-tree, so if we really want to deprecate it we need
to fix xend too. 

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