I've just enabled it. New installs will get it by default. Basically, if you have less than 512Mb RAM, size is capped to 10% (size=10%), otherwise is capped to 100Mb.
Let's see how many exotic apps will break. commit 14d6b4ec6c8b7e524552101bb69296bebb1cfa9c Author: Fabio Erculiani <[email protected]> Date: Sun Feb 3 05:42:33 2013 +0000 [storage] implement /tmp over tmpfs, with noexec,nosuid,nodev and variable size. Many unix oses do it since 1994, Fedora started doing it since 18. /tmp is typically world-writable, which is bad for many reasons. Forcing noexec,nosuid,nodev by default increases security by mitigating the damage of possible race-condition based attacks. See: http://git.sabayon.org/anaconda.git/commit/?id=14d6b4ec6c8b7e524552101bb69296bebb1cfa9c -- Fabio Erculiani
