[lttng-dev] [PATCH] Expose kernel tracer to user-space (version 7)

[Mathieu Desnoyers]

* Thomas Petazzoni (thomas.petazzoni at free-electrons.com) wrote:
> Hello,
> 
> Le Tue,  3 Jul 2012 15:29:12 +0200,
> Francis Giraldeau <francis.giraldeau at gmail.com> a écrit :
> 
> > By writing to the file /proc/lttng_uevent, a user-space application creates a
> > kernel event. The event's payload is by default UTF-8 text, but any data can be
> > written. The maximum size of the data is at most the size of a packet defined
> > for the trace session. Null-character is optional and is not enforced.  The
> > event uses sequence for space efficiency and to store any data as payload.
> 
> Shouldn't this be in the debugfs filesystem rather than the proc
> filesystem? The debugfs filesystem already has entries for various
> tracing facilities of the Linux kernel, and adding entries in /proc
> that are not process-related is frowned upon these days.

yes, I think this infrastructure should belong in debugfs.

Thanks,

Mathieu

> 
> Best regards,
> 
> Thomas
> -- 
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
> 
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com