Unfortunately, relatime is not free. As you can see below, it has roughly double the overhead of noatime. Personally, I don’t think relatime is worth it. (...) if the goal is to reduce your file system’s write load, especially where an SSD is involved, I would strongly recommend the use of noatime over relatime.
[^] # Re: noatime et deadline
Posté par patrick_g (site web personnel) . En réponse au journal Migrer vers un SSD simplement avec lvm. Évalué à 8.
Non, il rulez rien du tout.
De Ted Ts'o :