I'm using qgroups and have created a few hundreds of subvolumes in the past.
It seems that btrfs automatically assigns a qgroup to newly created snapshot/subvolume, but does not destroy the qgroup when the subvolume is deleted. So I've tried to destroy the unused qgroups, with mixed success. I was able to destroy most of them, but some are still failing, i.e.: # btrfs qgroup destroy 4494 /mnt/lxc1 ERROR: unable to create quota group: Device or resource busy Note the negative number here, but I also have qgroups with both positive numbers, which I'm not able to destroy as well: # btrfs qgroup show /mnt/lxc1 | grep 4494 0/4494 839516160 -69632 qgroup 4494 is not used by any subvolume: # btrfs sub list /mnt/lxc1 | grep 4494 I did run "btrfs quota rescan" for this filesystem, hoping it will fix the problem, but it didn't. Any advice? -- Tomasz Chmielewski http://wpkg.org -- 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
