Re: [Qemu-devel] What's the intended use of log.h logging?

[Peter Maydell]

On 16 October 2015 at 14:30, Paolo Bonzini <address@hidden> wrote:
>
>
> On 16/10/2015 15:29, Peter Maydell wrote:
>>> > You can use globs in tracepoint names you want to enable. So if the
>>> > tracepoints have structured / well considerd name prefixes, you can
>>> > enable classses at once.
>> ...but in practice we don't really do that very much, and we
>> don't have documented lists of classes which we support either.
>> Guessing what might be a plausible glob of tracepoint names to
>> enable seems like a definite step back from the formalized
>> logging categories we have currently.
>
> We could add "-d trace:help" to list valid tracepoint names.

I think people are mostly going to care about categories
(eg "enable tracing for device X", or "enable tracing for
all unimplemented features", or "enable a medium level of
debug tracing for device Y".

If we want to get there we need to define standards for
naming tracepoints and enforce them somehow
(subsystem_category_level_tracepointname ?)

thanks
-- PMM