Just as a follow-up, I upgraded btrfs-tools and the kernel again. I currently have a filesystem which reports 1G exclusive use:
root@riff# btrfs qg show -r -e /var -p -c qgroupid rfer excl max_rfer max_excl parent child -------- ---- ---- -------- -------- ------ ----- 0/261 1.52GiB 1.01GiB 0.00B 100.00GiB --- --- This filesystem reports over quota, and removing the quota fixes that: root@riff# touch x touch: cannot touch ‘x’: Disk quota exceeded root@riff# btrfs qg limit -e none 261 /var root@riff# touch x root@riff# So at the moment quotas are pretty much unusable in kernel 3.18.6/tools 3.18.2, at least for my use case, and that's a bit surprising since there isn't anything very interesting about it (other than it contains a bunch of lxc-cloned rootfs). I've proactively added Yang who has submitted a few patches on quota checking recently just to let me know if he thinks that this should be fixed with a trunk kernel, or if he'd like to investigate or consider this further. Thanks! On Wed, Dec 24, 2014 at 03:52:41AM +0000, Duncan wrote: > Christian Robottom Reis posted on Tue, 23 Dec 2014 18:36:02 -0200 as > excerpted: > > > On Tue, Dec 16, 2014 at 11:15:37PM -0200, Christian Robottom Reis wrote: > >> # btrfs qgroup limit 2000m 0/261 . && touch x touch: cannot touch > >> ‘x’: Disk quota exceeded > >> > >> The strange thing is that it doesn't seem to be actually out of space: > >> > >> # btrfs qgroup show -p -r -e /var | grep 261 > >> 0/261 1111810048 391114752 2097152000 0 --- > > > > Replying to myself as I had not yet been subscribed in time to receive a > > reply; I just upgraded to 3.18.1 and am seeing the same issue on the > > same subvolume (and on no others). > > Looking at the thread here on gmane.org (list2news and list2web gateway), > it appears my reply was the only reply in any case, and it was general as > I don't run quotas myself. > > Basically I suggested upgrading, as the quota code as some rather huge > bugs in it (quotas could go seriously negative!) with the old versions > you were running. But you've upgraded at least the kernel now (userspace > you didn't say). > > Here's a link to the thread on the gmane web interface for completeness, > but the above about covers my reply, as I said the only one until your > thread bump and my reply here, so there's not much new there unless > someone posts further followups to this thread... > > > http://comments.gmane.org/gmane.comp.file-systems.btrfs/41491 > > > -- > Duncan - List replies preferred. No HTML msgs. > "Every nonfree program has a lord, a master -- > and if you use the program, he is your master." Richard Stallman > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Christian Robottom Reis | [+1] 612 888 4935 | http://launchpad.net/~kiko Canonical VP Hyperscale | [+55 16] 9 9112 6430 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
