Searching the kernel mailing-list I've found a patch that tackles this issue, but it seems that it has not be included in mainline:
http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg77864.html

I don't know if any distro implements some kind of patch like this but if someone can give me a clue would be great!

Edit: At least Openwall supports it (http://www.openwall.com/Owl/CHANGES-2.0.shtml)