Re: Rust in QEMU roadmap

[Paolo Bonzini]

On Wed, Nov 27, 2024 at 1:18 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
> I question the usefulness of the 'syslog' trace target. I can't see
> it being desirable as a option for 'production' builds, and it seems
> uneccessarily indirect for developers. What's its compelling USP ?
>
> WRT 'ftrace', IIUC, the Linux 'perf' command has built-in support
> for using USDT probes now:
>
>   https://www.brendangregg.com/perf.html#StaticUserTracing

I also wonder if 'ftrace' is duplicating 'log' these days. Anyhow, if
we can deprecate 'syslog' and 'ftrace' that would be good to know
independent of Rust.

Paolo

> WRT 'ust', in LTTng, I see reference to the ability to use USDT probes,
> so I wonder if we still need a dedicated 'ust' backend around ?
>
> Potentially we're down to three options 'log', 'simple', and 'dtrace'.
>
> With regards,
> Daniel
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