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Why is relatime immune to remount?



Hi,

my root filesystem is mounted with the option relatime for
some reason (I just have defaults in /etc/fstab).

Any attempt to temporarily disable the option fails,
even with norelatime, which appears to be a valid option.
Is this expected or a bug?

(fedora 9 with 2.6.25.3-18)

[root thinkpad ~]# cat /proc/mounts |grep /dev/root
/dev/root / reiserfs rw,relatime 0 0
[root thinkpad ~]# mount / -o remount,norelatime
[root thinkpad ~]# cat /proc/mounts |grep /dev/root
/dev/root / reiserfs rw,relatime 0 0
[root thinkpad ~]# mount / -o remount,atime
[root thinkpad ~]# cat /proc/mounts |grep /dev/root
/dev/root / reiserfs rw,relatime 0 0
[root thinkpad ~]# mount / -o remount,noatime
[root thinkpad ~]# cat /proc/mounts |grep /dev/root
/dev/root / reiserfs rw,noatime,relatime 0 0
[root thinkpad ~]# mount / -o remount,atime
[root thinkpad ~]# cat /proc/mounts |grep /dev/root
/dev/root / reiserfs rw,relatime 0 0
[root thinkpad ~]# mount / -o remount,nonononononorelatime
mount: / not mounted already, or bad option

--
   Roberto Ragusa    mail at robertoragusa.it


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