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On a linux box for my work, I had similar fail(test_ioctl and 
test_ioctl_mutate).

My System:
* Python : 2.3.3, 2.4
* kernel : 2.4.22
* GCC    : 2.95.3
* glibc  : 2.2

I don't know why but somehow test_ioctl.py seems to be 
invoked in the background on 'make test' process, which 
resuls in 2 fails.

Maybe the easiest way to make test_ioctl fail is :
  $ ./python ./Lib/test/regrtest.py test_ioctl &