> Manager checks thr->setuperr after waitpid().
> The thread itself never runs when it fails.
*When* does the manager checks for it? The clone might not have
executed a single instruction when the clone() function returns. And I
don't want to add a mutex etc in there which means lots of more
syscalls and context switches.
> P.S.: What do you think about the cmpxchg emulation in kernel idea
> to speed up the mutexes?
I'm not sure what you mean. You can compile without the compatibility
stuff. At least this is what is done if you configure for i686.
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