On Sat, Sep 5, 2015 at 8:21 AM, Nikos Chantziaras <[email protected]> wrote: > On 05/09/15 08:52, Dale wrote: >> >> tmpfs /var/tmp/portage tmpfs noatime 0 >> 0 > > > Off-topic: forget "noatime". Use "lazytime" instead: > https://lwn.net/Articles/621046
I don't really see the point in using either for tmpfs. If the file is read its inode is in RAM, and altering it costs just a few CPU cycles. On disk it makes a big difference though. Also, I'd be careful about anything other than noatime on COW filesystems like ZFS/btrfs. Disk reads will consume disk space if you have any snapshots, since you're modifying inodes. lazytime does't really do anything to fix this (I believe the intent is to update atime ever 24 hrs as with relatime, but I don't know if this is implemented yet). -- Rich
