Would people be interested in a trivial patch that adds O_NOATIME
to open() for platforms that support it? (apparently Linux 2.6.8
and better).
It seems to work here, feels harmless to me (an easy ifdef to
check if it's there), and seems it would theoretically help,
though I don't notice a consistent difference (I guess I"m not
thrashing my disks hard enough?). Are there any open()s where
we don't want NOATIME if available?