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

[Peter Maydell]

On 16 October 2015 at 14:26, Daniel P. Berrange <address@hidden> wrote:
>> It's also very useful to be able to enable whole *classes* of
>> tracing (like "tell me whenever my guest OS does something dumb");
>> does the tracepoint code have any support for this?
>
> 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.

-- PMM