Comment # 2 on bug 1037118 from Martin Wilck

full btrfsck output:

apollon:~ # btrfsck /dev/sda2
Checking filesystem on /dev/sda2
UUID: d0ad3db2-9b41-4836-9ff9-b15adea02852
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
checking quota groups
ERROR: out of memory
ERROR: Loading qgroups from disk: -2
ERROR: failed to check quota groups
found 34703896576 bytes used, error(s) found
total csum bytes: 31929076
total tree bytes: 1242185728
total fs tree bytes: 1142243328
total extent tree bytes: 54919168
btree space waste bytes: 223257326
file data blocks allocated: 266488836096
 referenced 82083454976
extent buffer leak: start 163012608000 len 16384
extent buffer leak: start 10891558912 len 16384