Comment # 66 on bug 1063638 from Eric Schirra

(In reply to Eric Schirra from comment #65)
> (In reply to Richard Brown from comment #63)
> > (In reply to Gabor Katona from comment #61)
> > 
> > > Yes, you are right, I was not precise. However, despite marking quotas and
> > > qgroups as experimental, these are enabled by default in opensuse. And this
> > > should be changed immediately. Btrfs as presented in opensuse is
> > > experimental without under the hood tweaking.
> > 
> > quotas and qgroups are not experimental
> > 
> > https://btrfs.wiki.kernel.org/index.php/Status
> > 
> > They are defined as "safe for general use, there are some known problems
> > that do not affect majority of users"
> 
> This isn't right.
> In your link is:
> 
> Quotas, qgroups | mostly OK | tbd | mostly OK |	qgroups with many snapshots
> slows down balance 
> 
> This shows accurate the problems: mostly and slows down!!
> 
> For me, this is not stable.

And under known issus (https://btrfs.wiki.kernel.org/index.php/Quota_support):
Combining quota with (too many) snapshots of subvolumes can cause performance
problems, for example when deleting snapshots.