[gentoo-user] Is there a standard sysctl-like way to modify sysfs files at boot time?

[Mark David Dumlao]

I want to do this:
http://blog.internetnews.com/skerner/2010/11/forget-200-lines-red-hat-speed.html

in userspace, but automate it at boot time. it requires that I create and
mount the cgroup subsystem in sysfs and sounds a lot like something that I'd
do in sysctl for /proc/sys, but for sysfs rather than procfs.

The only thing that comes to mind is to append to the local init script, but
it's so close to what sysctl does that I feel like someone's probably
written some tool for it. Is there one?
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