On Tue, Dec 18, 2007 at 03:04:03PM +0100, Jan Engelhardt wrote: > Hi, > > > In https://bugzilla.novell.com/show_bug.cgi?id=345338 it is claimed that > resetting the quota flags in the mounting sequence rw,ro,rw is a bug, but I
You mounted without quotas in the middle step, thereby invalidating them. > would say this is not the case, as quota is metadata, and the log is replayed > in ro mode even for other filesystems. Yet, it is still not nice, and I have > been trying with this patch, which does not do the right thing yet. (It does a > recovery when mounting for the 3rd time, which probably just says that I did > not know too much of xfs internals to cook up a nicely working patch.) > Opinions? Log recovery occurs on read only mounts. Log recovery on filesystems without quota enabled ignores quota changes in the log (as quotas are not enabled and hence we can't assume that there's dquots still on disk). Hence a mount read only without quota enabled will leave quota inconsistent on disk. i.e > mount -o usrquota,grpquota /dev/mapper/myxfs /mnt > umount /mnt > mount -o ro /dev/mapper/myxfs /mnt Quota is now potentially inconsistent, and hence: > umount /mnt > mount -o usrquota,grpquota /dev/mapper/myxfs /mnt This mount *must* recalculate it. So, behaviour is as expected given the above command sequence. You should use this as the middle step: mount -o ro,usrquota,grpquota /dev/mapper/myxfs /mnt So that log replay replays all the journalled quota changes so that the quota remains consistent with the rest of the filesystem. Then you wont see a recalc when you remount rw. Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/