xfs quotas don't work...

[SeeksTheMoon]

I had a /home partition for my 240 users running with reiserfs and diskquotas and moved to a bigger xfs partition with quota support (2.6.23 hardened).
First thing was: the old quotasystem didn't work with the new partition. I found some documentation that said, I have to disable all the old quota stuff because xfs has it's own quotasystem (which is odd because official SGI docs tell me, that xfs works fine with the default linux quota programs).
So I disabled the old quotas and now I'm trying to get my groupquotas to work, but this doesn't work and I don't know why. This is how I do it:
~ # xfs_quota -x -c 'limit -g bsoft=1000m bhard=1g users' /home
xfs_quota: cannot set limits: no such process
(process? who? what? donno...)

this is my fstab entry for /home:
/dev/md5 /home xfs defaults,auto,grpquota,nosuid,nodev 0 0

~# xfs_quota -x -c 'print'
Filesystem Pathname
/home /dev/md5 (uquota) <- this is strange but I cannot change that to gquota, even with mount -o remount /home

~ # mount | grep home
/dev/md/5 on /home type xfs (rw,nosuid,nodev,grpquota) <- so why does xfs_quota say uquota??


What can I do?

[djinnZ]

CONFIG_XFS_QUOTA and CONFIG_QFMT_V2 are set to y in kernel?
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[SeeksTheMoon]

yes, both. And a reboot solved my problem. Very strange, this should not be necessary.


Edit:
And now I know why: because I exported the homedir with NFS. I had to stop NFS first and then remount works...