Theodore Tso brought up some interesting tests about sticking to using noatime rather than relatime, especially when used with SSD's.http://thunk.org/tytso/blog/2009/03/01/ ... erelatime/
Even though I'm not using an SSD with my ppc box, I have long been a fan of noatime.
Noatime has been discussed for years, so I won't rehash the whole thing here. Since I don't need hard-core forensic timestamp security, nor new-mail message notifications from mutt, I stick to noatime.
I thought I'd throw this out for those who might be using embedded or other ssd ssd-type systems, or guys like me who just want the least amount of wear and tear on their legacy hardware. :)
(On a related note, one may want to investigate using either elevator=deadline or elevator=noop in their kernel scheduler with ssd's. For my spinning hard-drive, I just use CFQ)