Perhaps instead they could just invert the meaning of the 'A' file
attribute when a filesystem has been mounted with the noatime or relatime
option to force strict atime updates for files so marked. That way you
can mount your filesystem(s) noatime and only put the A attribute on your
mailboxes and you're done.
Posted Jun 10, 2009 10:06 UTC (Wed) by pjm (subscriber, #2080)
[Link]
One can more or less achieve that by applying chattr +A to the whole filesystem and then chattr -A on specific files. Note that chattr +A on a directory will be inherited by any files created in that directory (excluding moving an existing file into that directory).