Re: Dual-licensing LTTng, marker and tracepoints underGPLv2+/LGPLv2.1+

From: Ingo Molnar
Date: Wed Jun 24 2009 - 04:34:19 EST



* Mathieu Desnoyers <compudj@xxxxxxxxxxxxxxxxxx> wrote:

> Hi,
>
> We want to re-license LTTng as
>
> dual-license GPLv2 (or better)/LGPLv2.1 (or better)
>
> to facilitate code exchange between the GPLv2 LTTng kernel tracer
> and LGPLv2.1 userspace LTTng tracing library. This will also
> include kernel/marker.c, include/linux/marker.h,
> kernel/tracepoint.c and include/linux/tracepoint.h. For the LTTng
> tree, everything under the ltt/ subdirectory is targeted.
>
> I am the main author of most of these files, and I allow such
> license change as far as my code is concerned. Additionally, we
> need the approval of most people who contributed code to either
> LTTng, Linux Kernel Marker and Tracepoints.

Why dont you license the user-space library under the GPLv2?

Also, i dont agree that such interfaces should be ABIs, hence i
oppose the librarization of such raw kernel interfaces. For example
markers will be removed in the future, and tracepoints will sure
undergo more corrective iterations as well.

Ingo
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