We have a bug report requesting that we enable SECCOMP:
https://bugzilla.redhat.com/show_bug.cgi?id=295841
I suggest we enable it in Fedora 8 but leave it disabled in F7.
That way we're not changing a config item in a stable release,
and we don't have to carry patches to lower the feature's
overhead and make its API match 2.6.23's.