btrfs check --mode=lowmem

[1/7] checking root items
[2/7] checking extents
ERROR: extent[223983750217728, 268435456] referencer count mismatch (root: 5, owner: 107882330, offset: 0) wanted: 1, have: 4
ERROR: extent[223984018915328, 268435456] referencer count mismatch (root: 5, owner: 107882330, offset: 268435456) wanted: 1, have: 5
ERROR: extent[223984556310528, 268435456] referencer count mismatch (root: 5, owner: 107882330, offset: 805306368) wanted: 1, have: 6
ERROR: extent[224032453623808, 268435456] referencer count mismatch (root: 5, owner: 107882374, offset: 1073741824) wanted: 47, have: 68
ERROR: extent[224040823554048, 268435456] referencer count mismatch (root: 5, owner: 107882396, offset: 1342177280) wanted: 98, have: 110
ERROR: extent[224062454038528, 268435456] referencer count mismatch (root: 5, owner: 107882490, offset: 0) wanted: 21, have: 35
ERROR: extent[224076658638848, 268435456] referencer count mismatch (root: 5, owner: 107882515, offset: 0) wanted: 35, have: 58
ERROR: extent[224084509851648, 268435456] referencer count mismatch (root: 5, owner: 107882521, offset: 536870912) wanted: 15, have: 33
ERROR: extent[224092959735808, 268435456] referencer count mismatch (root: 5, owner: 107882646, offset: 0) wanted: 36, have: 86
ERROR: extent[224093704552448, 268435456] referencer count mismatch (root: 5, owner: 107882646, offset: 536870912) wanted: 49, have: 75
ERROR: extent[224099245293568, 268435456] referencer count mismatch (root: 5, owner: 107882663, offset: 0) wanted: 30, have: 45
ERROR: extent[224099782688768, 268435456] referencer count mismatch (root: 5, owner: 107882663, offset: 536870912) wanted: 25, have: 47
ERROR: errors found in extent allocation tree or chunk allocation
[3/7] checking free space cache
block group 226280647950336 has wrong amount of free space, free space cache has 35889152 block group has 49909760
failed to load free space cache for block group 226280647950336
[4/7] checking fs roots
ERROR: root 5 EXTENT_DATA[91794020 4096] gap exists, expected: EXTENT_DATA[91794020 128]
ERROR: root 5 EXTENT_DATA[91794024 4096] gap exists, expected: EXTENT_DATA[91794024 128]
ERROR: root 5 EXTENT_DATA[92279761 135168] csum missing, have: 69632, expected: 389120
ERROR: root 5 EXTENT_DATA[92279761 8341770240] csum missing, have: 69632, expected: 131072
ERROR: root 5 INODE[92279761] nbytes 8340762624 not equal to extent_size 8341917696
ERROR: errors found in fs roots
Opening filesystem to check...
Checking filesystem on /dev/sdh
UUID: 6f55e6ea-e1bf-4016-888b-0b1b8cf9a336
found 46544304676864 bytes used, error(s) found
total csum bytes: 44363353556
total tree bytes: 52676694016
total fs tree bytes: 1381240832
total extent tree bytes: 1781719040
btree space waste bytes: 3500002615
file data blocks allocated: 315281139904512
 referenced 49245846654976