Hi Andi,
This plan makes sense. I will split the "patched in enabled/disable
flags" part into a separate piece (good idea!) and then submit the LTTng
core to Andrew. Christoph's has a good point about wanting a usable
infrastructure to go ini. Regarding your plan, I must argue that
blktrace is not a general purpose tracing infrastructure, but one
dedicated to block io tracing. Therefore, it makes sense to bring in
the generic infrastructure first and then convert blktrace to it.
Mathieu
* Andi Kleen ([email protected]) wrote:
> > If we are looking at current "potential users" that are already in
> > mainline, we could change blktrace to make it use the markers.
>
> Ok, but do it step by step:
> - split out useful pieces like the "patched in enable/disable flags"
> and submit them separate with an example user or two
> [I got a couple of candidates e.g. with some of the sysctls in VM or
> networking]
> - post and merge that.
> - don't implement anything initially that is not needed by blktrace
> - post a minimal marker patch together with the blktrace
> conversion for review again on linux-kernel
> - await review comments. This review would not cover the basic
> need of markers, just the specific implementation.
> - then potentially merge incorporate review comments
> - then merge
> - later add features with individual review/discussion as new users in the
> kernel are added.
>
> -Andi
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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