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

[Paolo Bonzini]

On 16/10/2015 16:31, Peter Maydell wrote:
> > I hadn't thought about levels, but honestly when I use KVM tracing (which
> > is often measured in tens of megabytes per run) I don't care.
>
> In a lot of cases, especially with the TCG logging, not enabling
> voluminous tracing is really important because if you turn it all
> on then the system is way too slow (and can behave differently
> as a result), and generates gigabytes of trace output. (-d exec
> and -d cpu will do this, for instance.)

Yes, but device models are going to generate orders of magnitude smaller
traces than the CPU.  Since I'm not proposing to drop -d together, but
rather to integrate tracing with it, we can cross that river when we
reach it.

Paolo