zfsonlinux/zfs — pull request #2064 by dweeezil (2014-01-19 18:58:01+00:00)
Title: Implement relatime.

Add the "relatime" property. When set to "on", a file's atime will only
be updated if the existing atime at least a day old or if the existing
ctime or mtime has been updated since the last access. This behavior
is compatible with the Linux "relatime" mount option.