On Thu, 12 Jul 2012 17:31:50 -0700
Michel Lespinasse [off-list ref] wrote:

This small module helps measure the performance of rbtree insert and erase.

Additionally, we run a few correctness tests to check that the rbtrees have
all desired properties:
- contains the right number of nodes in the order desired,
- never two consecutive red nodes on any path,
- all paths to leaf nodes have the same number of black nodes,
- root node is black

Signed-off-by: Michel Lespinasse <redacted>
---
 Makefile            |    2 +-
 lib/Kconfig.debug   |    1 +
 tests/Kconfig       |   18 +++++++
 tests/Makefile      |    1 +
 tests/rbtree_test.c |  135 +++++++++++++++++++++++++++++++++++++++++++++++++++

This patch does a new thing: adds a kernel self-test module into
lib/tests/ and sets up the infrastructure to add new kernel self-test
modules in that directory.

I don't see a problem with this per-se, but it is a new thing which we
should think about.

In previous such cases (eg, kernel/rcutorture.c) we put those modules
into the same directory as the code which is being tested.  So to
follow that pattern, this new code would have gone into lib/.

If we adopt your new proposal then we should perhaps also move tests
such as rcutorture over into tests/.  And that makes one wonder whether
we should have a standalone directory for kernel selftest modules.  eg
tests/self-test-nmodules/.

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