I recently downloaded Centos 5.5 (same as Red Hat 5.5?), based on 2.6.18 kernel. I note that even at that revision, many of the kernel trace-points are in the code, and the kernel has been built with CONFIG_TRACEPOINTS=y, CONFIG_MARKERS=y, and CONFIG_SAMPLE_TRACEPOINTS=m.
My question is: will I be able to use LTTng without rebuilding the kernel? I've downloaded the following, aiming for the closest compatible with 2.6.18: Genevent-0.31 Linuxtracetoolkitviewer-0.8.72-06122006 Ltt-control-0.31-20112006 Ltt-usertrace-0.21 Patch-2.6.18-lttng-0.6.41 Though ./configure does a lot of work in each of these projects, I'm missing an overall description of which pieces are needed, where they have to reside, and how to turn them on. Is there a basic how-to manual? The patches would imply that I have to rebuild the kernel, though it seemed they were all extensions to kernel header files, and patches to LTTng sources. I'm also trying to use tracepoints for my own purposes, and my Linux box crashes hard when I call register_trace_sched_switch from a loadable module. Any ideas how to debug this?
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