Re: [Qemu-devel] [RFC PATCH v3 1/8] tracetool: Rewrite infrastructure as python modules

[Stefan Hajnoczi]

On Fri, Mar 30, 2012 at 06:55:16PM +0200, Lluís Vilanova wrote:
> Stefan Hajnoczi writes:
> >> +    kwargs = {}
> >> +
> >> +    try:
> >> +        tracetool.generate(sys.stdin, arg_format, arg_backend, **kwargs)
> 
> > If forgot to ask what kwargs is doing here?   Can we default to {}?
> > Otherwise let's drop it for now since there are no options defined yet.
> 
> It's used later in the patch adding dtrace support. I just thought it would be
> better to maintain the interface of 'tracetool.generate' instead of adding new
> parameters later when necessary.

Thanks for pointing that out.  I went back to look at how the
dtrace-specific options get passed in.  I noticed you assigned them
directly to dtrace.py module variables - probably because you didn't
want to add the (mostly unused) kwargs argument to all code generation
functions?

For now I think this is okay since most backends don't care about
kwargs.  If we need it more maybe we should think of a cleaner solution.

Stefan