Hi Vasili,
try one of Linux groups at http://www.nabble.com/Linux-f252.html or maybe Linux kernel group http://www.nabble.com/linux-kernel-f49.html . But I don't know if there are people working with Haskell in Linux as well. But if you would like to ask something only about POSIX, I think they may help.

Fero

2008/7/21 Galchin, Vasili <vigalchin@gmail.com>:
Hello,
    I am working on POSIX stuff. I have used Linux as my POSIX OS and have read source when I could find it. Does anybody in this
    group of Linux newsgroup where one can ask Linux-related implementation questions?

Regards, Vasili

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