> I'm also in favor of reverting this commit.

Hum, the problem is that the Python test suite creates a lot of threads. Revert the patch doesn't change anything for the test suite. I mean that all tests relying on signal delivery should (must) be running in a new fresh process, especially if the test expects that the signal is received immediatly (as described in POSIX). If we don't use a subprocess, the tests will fail sometimes if at least one thread was created before.

I will try to write a patch which implement all requirements we listed in this issue. I just fear that it is a little bit overkill just to support an "old" (?) OS. But fixing a test for FreeBSD 6 improves usually the reliability on other OSes, especially when we replaced fork() by subprocess.