Hi Ingo.

I have some programs that crash
in 2.6.12-rc2-mm3. After seeing this:
http://www.uwsg.iu.edu/hypermail/linux/kernel/0504.1/1091.html
I tried to revert the
sched-unlocked-context-switches.patch
and indeed the problem goes away.
Attached is the (crappy) test-case.
If you can make it to say "All OK"
then the problem is solved.
Apparently the %fs gets trashed
somewhere, any ideas?