Here is a sample script to recreate the issue:
mkfs.btrfs -f /dev/vdb
mount /dev/vdb /mnt
btrfs quota enable /mnt
btrfs sub create /mnt/tmp
btrfs qgroup limit 200M /mnt/tmp
btrfs quota rescan -w /mnt
cd /mnt/tmp
for i in {1..5}; do
sync
dd if=/dev/zero of=/mnt/tmp/file-$i oflag=direct
sync
done
btrfs qgroup show -pcref /mnt/tmp
Output:
Create subvolume '/mnt/tmp'
quota rescan started
dd: writing to '/mnt/tmp/file-1': Disk quota exceeded
11991+0 records in
11990+0 records out
6138880 bytes (6.1 MB, 5.9 MiB) copied, 2.40459 s, 2.6 MB/s
dd: writing to '/mnt/tmp/file-2': Disk quota exceeded
11807+0 records in
11806+0 records out
6044672 bytes (6.0 MB, 5.8 MiB) copied, 2.11256 s, 2.9 MB/s
dd: writing to '/mnt/tmp/file-3': Disk quota exceeded
11628+0 records in
11627+0 records out
5953024 bytes (6.0 MB, 5.7 MiB) copied, 2.53767 s, 2.3 MB/s
dd: writing to '/mnt/tmp/file-4': Disk quota exceeded
11080+0 records in
11079+0 records out
5672448 bytes (5.7 MB, 5.4 MiB) copied, 2.3697 s, 2.4 MB/s
dd: writing to '/mnt/tmp/file-5': Disk quota exceeded
11358+0 records in
11357+0 records out
5814784 bytes (5.8 MB, 5.5 MiB) copied, 2.10354 s, 2.8 MB/s
qgroupid rfer excl max_rfer max_excl parent child
-------- ---- ---- -------- -------- ------ -----
0/257 28.84MiB 28.84MiB 200.00MiB none --- ---
The files created are only 5-6MB when the subvolume size is 200m. Each
of the attempts, including the first attempt, returns EDQUOT at around
5-6 MB.
--
Goldwyn
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
