On 2/23/14, 3:37 AM, Marko Weber|8000 wrote: > > > hello list, > > i have a question about mount options. > > at first my fstab: > > /dev/md0 /boot xfs noauto,noatime 1 2 > /dev/md2 / xfs noatime,nodiratime,nobarrier,largeio,discard,logbsize=256k,noikeep 0 1 I guess I won't ask why you decided to tweak all those knobs... <snip> > (YES!, normally i use Label or UUID..... but this is only a test machine.....) > > > AFTER reboot "mount" shows this: > > rootfs on / type rootfs (rw) > /dev/root on / type xfs (rw,noatime,nodiratime,attr2,nobarrier,inode64,noquota) <snip> default mount options > > on /dev/root "discrad" and some other are not shown > > > when i do a "mount -o remount /" > > "mount" shows this: > > > rootfs on / type rootfs (rw) > /dev/root on / type xfs (rw,noatime,nodiratime,nobarrier,largeio,discard,logbsize=256k,noikeep) > /dev/md1 on /tmp type xfs (rw,noexec,noatime,nodiratime,nobarrier,largeio,discard,logbsize=256k,noikeep) tweaked options. <snip> > > now,all options from /etc/fstab are listed. > Is this XFS related? Not really. Only some xfs options are remountable, so unless you originally mounted with, say, "largeio" the option won't be in effect. Mount -o remount won't enable it. So if you really want all those options enabled on your root fs, you'll need to have them in your initrd/initramfs so that the original mount of the root fs at boot time includes them. Also, mount may be looking at /etc/mtab rather than /proc/mounts. /proc/mounts contains the true state of the fileystem w.r.t. mount options. /etc/mtab is managed by mount, and knows nothing about what the filesystem actually did: [root@sandeen ~]# mount -o remount,notanoption /home [root@sandeen ~]# mount | grep home /dev/md2 on /home type xfs (rw,notanoption) [root@sandeen ~]# grep home /proc/mounts /dev/md2 /home xfs rw,seclabel,relatime,attr2,delaylog,noquota 0 0 -Eric _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
