On my linux box I tried to achieve regular atime behaviour, tried mount with
no atime related option at all, tried mount options atime, sync,
osyncisosync, .. XFS on plain partitions, on loop devices .. I tried another
kernel (sidux image with kernel 2.6.25-9) ..
It seems impossible to switch off "noatime" mount option.
atime updates happen only in core, never on disk unless coinciding with other
inode modifications, regardless of specified mount options.
$ uname -a
Linux roland 22.214.171.124roland2 #2 Tue Apr 15 17:10:52 CEST 2008 i686 GNU/Linux
$ zgrep XFS /proc/config.gz
# CONFIG_XFS_QUOTA is not set
# CONFIG_VXFS_FS is not set
In mailing list archive I found
It seems, that 3 years ago an unconditional noatime enforcement has been
(1) If this is true, please update documentation accordingly.
Users, who need a filesystem with regular atime behaviour, will no more waste
their time to try XFS, when in fact it is unusable for their particular
(2) If I missed a possibility to achieve regular atime behaviour, please
document it in Documentation/filesystems/xfs.txt and in man 8 mount.