Hi,

btrfs-progs 4.16, kernel 4.16

--mode original comes up with no errors, --mode lowmem comes up with a
bunch of "referencer count mismatch" messages and also ERROR: errors
found in extent allocation tree or chunk allocation, and most of the
byte totals differ as well.

<original
>lowmem

<found 807219568640 bytes used, no error found
>found 807241723904 bytes used, error(s) found
<total csum bytes: 783568540
>total csum bytes: 783568540
<total tree bytes: 4670013440
>total tree bytes: 8539635712
<total fs tree bytes: 3664117760
>total fs tree bytes: 7533740032
<total extent tree bytes: 171425792
>total extent tree bytes: 171425792
<btree space waste bytes: 714424438
>btree space waste bytes: 1366949310
<file data blocks allocated: 18927213621248
>file data blocks allocated: 35905640476672
< referenced 3122882674688
> referenced 6583743541248

A btrfs-image for this same file system was submitted for other lowmem
complaints including this one, but seems there are more of this
message now with 4.16, and no other messages. But I can make another
image if that's helpful or whatever other info is needed.

File system is working fine near as I can tell, and passed an online
scrub in the past week with zero errors.

compat_flags        0x0
compat_ro_flags        0x0
incompat_flags        0x161
            ( MIXED_BACKREF |
              BIG_METADATA |
              EXTENDED_IREF |
              SKINNY_METADATA )

[chris@f28s ~]$ sudo btrfs fi df -b /mnt/first
Data, single: total=803158884352, used=802571710464
System, DUP: total=33554432, used=98304
Metadata, DUP: total=5905580032, used=4669915136
GlobalReserve, single: total=536870912, used=0

[chris@f28s ~]$ sudo btrfs fi show --raw /mnt/first
Label: 'first'  uuid: 0f43f49d-6e63-4b1b-bc8c-c54da409872d
    Total devices 1 FS bytes used 807241723904
    devid    2 size 1099509530624 used 815037153280 path /dev/mapper/first


128 subvolumes, 122 of which are ro snapshots


Attached file contains both btrfs checks and dump super


-- 
Chris Murphy
[chris@f28s ~]$ sudo btrfs --version
btrfs-progs v4.16
[chris@f28s ~]$ sudo btrfs check /dev/mapper/first
Checking filesystem on /dev/mapper/first
UUID: 0f43f49d-6e63-4b1b-bc8c-c54da409872d
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
found 807219568640 bytes used, no error found
total csum bytes: 783568540
total tree bytes: 4670013440
total fs tree bytes: 3664117760
total extent tree bytes: 171425792
btree space waste bytes: 714424438
file data blocks allocated: 18927213621248
 referenced 3122882674688

[chris@f28s ~]$ sudo btrfs check --mode lowmem /dev/mapper/first
Checking filesystem on /dev/mapper/first
UUID: 0f43f49d-6e63-4b1b-bc8c-c54da409872d
checking extents
ERROR: extent[1258793181184, 81903616] referencer count mismatch (root: 2192, 
owner: 323075, offset: 0) wanted: 551, have: 625
ERROR: extent[1258899460096, 82878464] referencer count mismatch (root: 2192, 
owner: 323115, offset: 0) wanted: 521, have: 633
ERROR: extent[1259036663808, 64319488] referencer count mismatch (root: 2192, 
owner: 323125, offset: 0) wanted: 376, have: 491
ERROR: extent[1259102384128, 64552960] referencer count mismatch (root: 2192, 
owner: 323137, offset: 0) wanted: 439, have: 493
ERROR: extent[1259171381248, 113295360] referencer count mismatch (root: 2192, 
owner: 323147, offset: 0) wanted: 763, have: 865
ERROR: extent[1259307835392, 2576384] referencer count mismatch (root: 2192, 
owner: 323191, offset: 0) wanted: 9, have: 20
ERROR: extent[1259327455232, 30089216] referencer count mismatch (root: 2192, 
owner: 323203, offset: 0) wanted: 204, have: 230
ERROR: extent[1259372060672, 1974272] referencer count mismatch (root: 2192, 
owner: 323218, offset: 0) wanted: 13, have: 16
ERROR: extent[1259924090880, 22102016] referencer count mismatch (root: 2192, 
owner: 323199, offset: 427819008) wanted: 52, have: 169
ERROR: extent[1259960025088, 2211840] referencer count mismatch (root: 2192, 
owner: 323244, offset: 0) wanted: 11, have: 17
ERROR: extent[1260158959616, 53563392] referencer count mismatch (root: 2192, 
owner: 323328, offset: 0) wanted: 328, have: 409
ERROR: extent[1260258131968, 134217728] referencer count mismatch (root: 2192, 
owner: 323609, offset: 0) wanted: 959, have: 1024
ERROR: extent[1260410531840, 1716224] referencer count mismatch (root: 2192, 
owner: 323625, offset: 0) wanted: 4, have: 14
ERROR: extent[1261505388544, 1839104] referencer count mismatch (root: 2192, 
owner: 323654, offset: 0) wanted: 10, have: 15
ERROR: extent[1261846781952, 56676352] referencer count mismatch (root: 2192, 
owner: 323731, offset: 0) wanted: 354, have: 433
ERROR: extent[1262246526976, 2256896] referencer count mismatch (root: 2192, 
owner: 323750, offset: 0) wanted: 10, have: 18
ERROR: extent[1262765875200, 765952] referencer count mismatch (root: 2192, 
owner: 319045, offset: 0) wanted: 5, have: 6
ERROR: extent[1262984384512, 1642496] referencer count mismatch (root: 2192, 
owner: 322213, offset: 0) wanted: 6, have: 13
ERROR: extent[1263573057536, 1159168] referencer count mismatch (root: 2192, 
owner: 323009, offset: 0) wanted: 2, have: 9
ERROR: extent[1263615098880, 1220608] referencer count mismatch (root: 2192, 
owner: 323062, offset: 0) wanted: 1, have: 10
ERROR: extent[1263647588352, 2310144] referencer count mismatch (root: 2192, 
owner: 330026, offset: 0) wanted: 6, have: 18
ERROR: extent[1263665254400, 3538944] referencer count mismatch (root: 2192, 
owner: 330035, offset: 0) wanted: 16, have: 27
ERROR: extent[1263695650816, 1773568] referencer count mismatch (root: 2192, 
owner: 330054, offset: 0) wanted: 8, have: 14
ERROR: extent[1263894016000, 1536000] referencer count mismatch (root: 2192, 
owner: 319139, offset: 0) wanted: 9, have: 12
ERROR: extent[1263904493568, 1122304] referencer count mismatch (root: 2192, 
owner: 319151, offset: 0) wanted: 3, have: 9
ERROR: extent[1263915298816, 540672] referencer count mismatch (root: 2192, 
owner: 319176, offset: 0) wanted: 1, have: 5
ERROR: extent[1264166404096, 679936] referencer count mismatch (root: 2192, 
owner: 319672, offset: 0) wanted: 3, have: 6
ERROR: extent[1264205729792, 2166784] referencer count mismatch (root: 2192, 
owner: 319706, offset: 0) wanted: 13, have: 17
ERROR: extent[1264443080704, 327680] referencer count mismatch (root: 2192, 
owner: 319874, offset: 0) wanted: 2, have: 3
ERROR: extent[1264474132480, 1277952] referencer count mismatch (root: 2192, 
owner: 319926, offset: 0) wanted: 6, have: 10
ERROR: extent[1264494592000, 1622016] referencer count mismatch (root: 2192, 
owner: 319943, offset: 0) wanted: 12, have: 13
ERROR: extent[1264528855040, 2527232] referencer count mismatch (root: 2192, 
owner: 319965, offset: 0) wanted: 16, have: 20
ERROR: extent[1264556707840, 901120] referencer count mismatch (root: 2192, 
owner: 319974, offset: 0) wanted: 3, have: 7
ERROR: extent[1265866297344, 651264] referencer count mismatch (root: 2192, 
owner: 320062, offset: 0) wanted: 2, have: 5
ERROR: extent[1266110365696, 929792] referencer count mismatch (root: 2192, 
owner: 320074, offset: 0) wanted: 7, have: 8
ERROR: extent[1266197757952, 2420736] referencer count mismatch (root: 2192, 
owner: 320101, offset: 0) wanted: 12, have: 19
ERROR: extent[1266310610944, 2519040] referencer count mismatch (root: 2192, 
owner: 320139, offset: 0) wanted: 3, have: 20
ERROR: extent[1266373623808, 2641920] referencer count mismatch (root: 2192, 
owner: 320171, offset: 0) wanted: 6, have: 21
ERROR: extent[1266563051520, 1077248] referencer count mismatch (root: 2192, 
owner: 320185, offset: 0) wanted: 3, have: 9
ERROR: extent[1266759434240, 958464] referencer count mismatch (root: 2192, 
owner: 320203, offset: 0) wanted: 4, have: 8
ERROR: extent[1266968154112, 995328] referencer count mismatch (root: 2192, 
owner: 320237, offset: 0) wanted: 7, have: 8
ERROR: extent[1267030790144, 143360] referencer count mismatch (root: 2192, 
owner: 320262, offset: 0) wanted: 1, have: 2
ERROR: extent[1267294498816, 2236416] referencer count mismatch (root: 2192, 
owner: 320603, offset: 0) wanted: 7, have: 18
ERROR: extent[1267580084224, 2674688] referencer count mismatch (root: 2192, 
owner: 320658, offset: 0) wanted: 8, have: 21
ERROR: extent[1267642232832, 1830912] referencer count mismatch (root: 2192, 
owner: 320670, offset: 0) wanted: 9, have: 14
ERROR: extent[1267759599616, 827392] referencer count mismatch (root: 2192, 
owner: 320779, offset: 0) wanted: 1, have: 7
ERROR: extent[1267773407232, 749568] referencer count mismatch (root: 2192, 
owner: 320798, offset: 0) wanted: 5, have: 6
ERROR: extent[1267807432704, 794624] referencer count mismatch (root: 2192, 
owner: 320825, offset: 0) wanted: 3, have: 7
ERROR: extent[1268002275328, 2113536] referencer count mismatch (root: 2192, 
owner: 321004, offset: 0) wanted: 10, have: 17
ERROR: extent[1268018139136, 487424] referencer count mismatch (root: 2192, 
owner: 321022, offset: 0) wanted: 3, have: 4
ERROR: extent[1275709833216, 1851392] referencer count mismatch (root: 2192, 
owner: 297626, offset: 0) wanted: 3, have: 15
ERROR: extent[1276216307712, 1200128] referencer count mismatch (root: 2192, 
owner: 298910, offset: 0) wanted: 5, have: 10
ERROR: extent[1276231864320, 1441792] referencer count mismatch (root: 2192, 
owner: 298925, offset: 0) wanted: 3, have: 11
ERROR: extent[1276248236032, 1175552] referencer count mismatch (root: 2192, 
owner: 298937, offset: 0) wanted: 7, have: 9
ERROR: extent[1276260663296, 499712] referencer count mismatch (root: 2192, 
owner: 298955, offset: 0) wanted: 3, have: 4
ERROR: extent[1276349661184, 1343488] referencer count mismatch (root: 2192, 
owner: 299029, offset: 0) wanted: 2, have: 11
ERROR: extent[1276361928704, 679936] referencer count mismatch (root: 2192, 
owner: 299040, offset: 0) wanted: 4, have: 6
ERROR: extent[1276678701056, 442368] referencer count mismatch (root: 2192, 
owner: 298248, offset: 0) wanted: 1, have: 4
ERROR: extent[1276703105024, 1273856] referencer count mismatch (root: 2192, 
owner: 299421, offset: 0) wanted: 1, have: 10
ERROR: extent[1276746051584, 614400] referencer count mismatch (root: 2192, 
owner: 299487, offset: 0) wanted: 1, have: 5
ERROR: extent[1276758941696, 1392640] referencer count mismatch (root: 2192, 
owner: 299870, offset: 0) wanted: 8, have: 11
ERROR: extent[1276758941696, 1392640] referencer count mismatch (root: 2192, 
owner: 299983, offset: 0) wanted: 7, have: 10
ERROR: extent[1276772073472, 1224704] referencer count mismatch (root: 2192, 
owner: 299881, offset: 0) wanted: 9, have: 10
ERROR: extent[1276789489664, 1355776] referencer count mismatch (root: 2192, 
owner: 299896, offset: 0) wanted: 3, have: 11
ERROR: extent[1276805271552, 1290240] referencer count mismatch (root: 2192, 
owner: 299908, offset: 0) wanted: 4, have: 10
ERROR: extent[1276822466560, 1085440] referencer count mismatch (root: 2192, 
owner: 299923, offset: 0) wanted: 6, have: 9
ERROR: extent[1276839735296, 1454080] referencer count mismatch (root: 2192, 
owner: 299938, offset: 0) wanted: 6, have: 12
ERROR: extent[1276873445376, 1318912] referencer count mismatch (root: 2192, 
owner: 299968, offset: 0) wanted: 7, have: 11
ERROR: extent[1276898889728, 1146880] referencer count mismatch (root: 2192, 
owner: 299991, offset: 0) wanted: 2, have: 9
ERROR: extent[1277025230848, 1191936] referencer count mismatch (root: 2192, 
owner: 300096, offset: 0) wanted: 3, have: 10
ERROR: extent[1277102907392, 1318912] referencer count mismatch (root: 2192, 
owner: 300163, offset: 0) wanted: 8, have: 11
ERROR: extent[1277121216512, 1327104] referencer count mismatch (root: 2192, 
owner: 300178, offset: 0) wanted: 5, have: 11
ERROR: extent[1277188087808, 1179648] referencer count mismatch (root: 2192, 
owner: 300235, offset: 0) wanted: 7, have: 9
ERROR: extent[1277263859712, 1060864] referencer count mismatch (root: 2192, 
owner: 300300, offset: 0) wanted: 3, have: 9
ERROR: extent[1277330145280, 1019904] referencer count mismatch (root: 2192, 
owner: 300361, offset: 0) wanted: 5, have: 8
ERROR: extent[1277343236096, 1044480] referencer count mismatch (root: 2192, 
owner: 300378, offset: 0) wanted: 6, have: 8
ERROR: extent[1277425733632, 868352] referencer count mismatch (root: 2192, 
owner: 300464, offset: 0) wanted: 2, have: 7
ERROR: extent[1277739409408, 1138688] referencer count mismatch (root: 2192, 
owner: 300989, offset: 0) wanted: 1, have: 9
ERROR: extent[1277751787520, 1306624] referencer count mismatch (root: 2192, 
owner: 301002, offset: 0) wanted: 4, have: 10
ERROR: extent[1278093537280, 925696] referencer count mismatch (root: 2192, 
owner: 301572, offset: 0) wanted: 7, have: 8
ERROR: extent[1278124670976, 2674688] referencer count mismatch (root: 2192, 
owner: 301605, offset: 0) wanted: 5, have: 21
ERROR: extent[1278146277376, 2650112] referencer count mismatch (root: 2192, 
owner: 301615, offset: 0) wanted: 2, have: 21
ERROR: extent[1278179549184, 1032192] referencer count mismatch (root: 2192, 
owner: 301639, offset: 0) wanted: 7, have: 8
ERROR: extent[1278216667136, 2318336] referencer count mismatch (root: 2192, 
owner: 301660, offset: 0) wanted: 10, have: 18
ERROR: extent[1278231187456, 2211840] referencer count mismatch (root: 2192, 
owner: 301671, offset: 0) wanted: 12, have: 17
ERROR: extent[1278264672256, 1740800] referencer count mismatch (root: 2192, 
owner: 301691, offset: 0) wanted: 10, have: 14
ERROR: extent[1278339145728, 2289664] referencer count mismatch (root: 2192, 
owner: 302038, offset: 0) wanted: 6, have: 18
ERROR: extent[1278385999872, 1118208] referencer count mismatch (root: 2192, 
owner: 302074, offset: 0) wanted: 3, have: 9
ERROR: extent[1278455382016, 2969600] referencer count mismatch (root: 2192, 
owner: 302127, offset: 0) wanted: 20, have: 23
ERROR: extent[1278572425216, 761856] referencer count mismatch (root: 2192, 
owner: 301121, offset: 0) wanted: 1, have: 6
ERROR: extent[1278588706816, 1871872] referencer count mismatch (root: 2192, 
owner: 301134, offset: 0) wanted: 3, have: 15
ERROR: extent[1278617640960, 2121728] referencer count mismatch (root: 2192, 
owner: 301161, offset: 0) wanted: 16, have: 17
ERROR: extent[1278657347584, 1265664] referencer count mismatch (root: 2192, 
owner: 301188, offset: 0) wanted: 2, have: 10
ERROR: extent[1278674927616, 1822720] referencer count mismatch (root: 2192, 
owner: 301203, offset: 0) wanted: 9, have: 14
ERROR: extent[1278685224960, 1097728] referencer count mismatch (root: 2192, 
owner: 301208, offset: 0) wanted: 5, have: 9
ERROR: extent[1278730657792, 2580480] referencer count mismatch (root: 2192, 
owner: 301243, offset: 0) wanted: 15, have: 20
ERROR: extent[1278749044736, 3244032] referencer count mismatch (root: 2192, 
owner: 301256, offset: 0) wanted: 4, have: 25
ERROR: extent[1278770667520, 2633728] referencer count mismatch (root: 2192, 
owner: 301267, offset: 0) wanted: 3, have: 21
ERROR: extent[1278789185536, 364544] referencer count mismatch (root: 2192, 
owner: 301280, offset: 0) wanted: 1, have: 3
ERROR: extent[1279092916224, 1806336] referencer count mismatch (root: 2192, 
owner: 302234, offset: 0) wanted: 9, have: 14
ERROR: extent[1279329845248, 2109440] referencer count mismatch (root: 2192, 
owner: 302421, offset: 0) wanted: 10, have: 17
ERROR: extent[1279415287808, 1380352] referencer count mismatch (root: 2192, 
owner: 302465, offset: 0) wanted: 10, have: 11
ERROR: extent[1279732752384, 286720] referencer count mismatch (root: 2192, 
owner: 302526, offset: 0) wanted: 1, have: 3
ERROR: extent[1282148016128, 262144] referencer count mismatch (root: 2192, 
owner: 305352, offset: 0) wanted: 1, have: 2
ERROR: extent[1282167455744, 512000] referencer count mismatch (root: 2192, 
owner: 305401, offset: 0) wanted: 1, have: 4
ERROR: extent[1282197204992, 401408] referencer count mismatch (root: 2192, 
owner: 305500, offset: 0) wanted: 3, have: 4
ERROR: extent[1282218409984, 479232] referencer count mismatch (root: 2192, 
owner: 305576, offset: 0) wanted: 1, have: 4
ERROR: extent[1282224476160, 446464] referencer count mismatch (root: 2192, 
owner: 305590, offset: 0) wanted: 1, have: 4
ERROR: extent[1282228514816, 348160] referencer count mismatch (root: 2192, 
owner: 305606, offset: 0) wanted: 2, have: 3
ERROR: extent[1282247221248, 397312] referencer count mismatch (root: 2192, 
owner: 305652, offset: 0) wanted: 2, have: 4
ERROR: extent[1282264170496, 16564224] referencer count mismatch (root: 2192, 
owner: 305700, offset: 0) wanted: 103, have: 127
ERROR: extent[1282293092352, 33533952] referencer count mismatch (root: 2192, 
owner: 305712, offset: 0) wanted: 134, have: 256
ERROR: extent[1282355109888, 14557184] referencer count mismatch (root: 2192, 
owner: 305747, offset: 0) wanted: 78, have: 112
ERROR: extent[1282395701248, 36519936] referencer count mismatch (root: 2192, 
owner: 305768, offset: 0) wanted: 202, have: 279
ERROR: extent[1282460270592, 18821120] referencer count mismatch (root: 2192, 
owner: 305801, offset: 0) wanted: 79, have: 144
ERROR: extent[1282479751168, 44199936] referencer count mismatch (root: 2192, 
owner: 305787, offset: 0) wanted: 315, have: 338
ERROR: extent[1282537447424, 4571136] referencer count mismatch (root: 2192, 
owner: 305803, offset: 0) wanted: 7, have: 35
ERROR: extent[1282574532608, 1294336] referencer count mismatch (root: 2192, 
owner: 305825, offset: 0) wanted: 9, have: 10
ERROR: extent[1282597568512, 18264064] referencer count mismatch (root: 2192, 
owner: 306182, offset: 0) wanted: 72, have: 140
ERROR: extent[1282636775424, 24395776] referencer count mismatch (root: 2192, 
owner: 306200, offset: 0) wanted: 88, have: 187
ERROR: extent[1282663895040, 29925376] referencer count mismatch (root: 2192, 
owner: 306211, offset: 0) wanted: 107, have: 229
ERROR: extent[1282727006208, 1732608] referencer count mismatch (root: 2192, 
owner: 306284, offset: 0) wanted: 4, have: 14
ERROR: extent[1283804733440, 2121728] referencer count mismatch (root: 2192, 
owner: 307509, offset: 0) wanted: 7, have: 17
ERROR: extent[1285734670336, 1257472] referencer count mismatch (root: 2192, 
owner: 309442, offset: 0) wanted: 4, have: 10
ERROR: extent[1285748789248, 1019904] referencer count mismatch (root: 2192, 
owner: 309453, offset: 0) wanted: 3, have: 8
ERROR: extent[1285771227136, 1200128] referencer count mismatch (root: 2192, 
owner: 309482, offset: 0) wanted: 3, have: 10
ERROR: extent[1285781032960, 1413120] referencer count mismatch (root: 2192, 
owner: 309491, offset: 0) wanted: 3, have: 11
ERROR: extent[1285794684928, 1384448] referencer count mismatch (root: 2192, 
owner: 309511, offset: 0) wanted: 10, have: 11
ERROR: extent[1285803339776, 35004416] referencer count mismatch (root: 2192, 
owner: 309519, offset: 0) wanted: 103, have: 268
ERROR: extent[1285898678272, 74964992] referencer count mismatch (root: 2192, 
owner: 309539, offset: 0) wanted: 553, have: 572
ERROR: extent[1286063390720, 901120] referencer count mismatch (root: 2192, 
owner: 309818, offset: 0) wanted: 2, have: 7
ERROR: extent[1286080565248, 581632] referencer count mismatch (root: 2192, 
owner: 309832, offset: 0) wanted: 2, have: 5
ERROR: extent[1286091714560, 55832576] referencer count mismatch (root: 2192, 
owner: 309846, offset: 0) wanted: 421, have: 426
ERROR: extent[1286224744448, 1101824] referencer count mismatch (root: 2192, 
owner: 309914, offset: 0) wanted: 1, have: 9
ERROR: extent[1286245924864, 46239744] referencer count mismatch (root: 2192, 
owner: 309950, offset: 0) wanted: 208, have: 353
ERROR: extent[1286345191424, 61583360] referencer count mismatch (root: 2192, 
owner: 310410, offset: 0) wanted: 467, have: 470
ERROR: extent[1286411018240, 946176] referencer count mismatch (root: 2192, 
owner: 310415, offset: 0) wanted: 3, have: 8
ERROR: extent[1286445035520, 1765376] referencer count mismatch (root: 2192, 
owner: 310447, offset: 0) wanted: 12, have: 14
ERROR: extent[1286493294592, 1101824] referencer count mismatch (root: 2192, 
owner: 310497, offset: 0) wanted: 7, have: 9
ERROR: extent[1286503321600, 1622016] referencer count mismatch (root: 2192, 
owner: 310505, offset: 0) wanted: 4, have: 13
ERROR: extent[1286561673216, 1445888] referencer count mismatch (root: 2192, 
owner: 310586, offset: 0) wanted: 5, have: 12
ERROR: extent[1286589431808, 1449984] referencer count mismatch (root: 2192, 
owner: 310602, offset: 0) wanted: 2, have: 12
ERROR: extent[1286600970240, 1220608] referencer count mismatch (root: 2192, 
owner: 310616, offset: 0) wanted: 1, have: 10
ERROR: extent[1286639788032, 1437696] referencer count mismatch (root: 2192, 
owner: 310651, offset: 0) wanted: 1, have: 11
ERROR: extent[1286727856128, 1028096] referencer count mismatch (root: 2192, 
owner: 310773, offset: 0) wanted: 5, have: 8
ERROR: extent[1286823809024, 1056768] referencer count mismatch (root: 2192, 
owner: 310818, offset: 0) wanted: 3, have: 9
ERROR: extent[1286846889984, 60305408] referencer count mismatch (root: 2192, 
owner: 310860, offset: 0) wanted: 163, have: 461
ERROR: extent[1286965108736, 12251136] referencer count mismatch (root: 2192, 
owner: 310890, offset: 0) wanted: 52, have: 94
ERROR: extent[1286995849216, 37302272] referencer count mismatch (root: 2192, 
owner: 310896, offset: 0) wanted: 267, have: 285
ERROR: extent[1287054004224, 59039744] referencer count mismatch (root: 2192, 
owner: 310921, offset: 0) wanted: 291, have: 451
ERROR: extent[1287136403456, 2404352] referencer count mismatch (root: 2192, 
owner: 310936, offset: 0) wanted: 3, have: 19
ERROR: extent[1287167025152, 700416] referencer count mismatch (root: 2192, 
owner: 310973, offset: 0) wanted: 5, have: 6
ERROR: extent[1287178797056, 831488] referencer count mismatch (root: 2192, 
owner: 310993, offset: 0) wanted: 4, have: 7
ERROR: extent[1287236378624, 872448] referencer count mismatch (root: 2192, 
owner: 309269, offset: 0) wanted: 1, have: 7
ERROR: extent[1287247785984, 819200] referencer count mismatch (root: 2192, 
owner: 309283, offset: 0) wanted: 4, have: 7
ERROR: extent[1287278882816, 671744] referencer count mismatch (root: 2192, 
owner: 309344, offset: 0) wanted: 3, have: 6
ERROR: extent[1288091054080, 524288] referencer count mismatch (root: 2192, 
owner: 312832, offset: 0) wanted: 1, have: 4
ERROR: extent[1288558190592, 134217728] referencer count mismatch (root: 2192, 
owner: 313603, offset: 0) wanted: 979, have: 1024
ERROR: extent[1288755884032, 1441792] referencer count mismatch (root: 2192, 
owner: 313655, offset: 0) wanted: 4, have: 11
ERROR: extent[1289352884224, 1601536] referencer count mismatch (root: 2192, 
owner: 313787, offset: 0) wanted: 2, have: 13
ERROR: extent[1289358970880, 134217728] referencer count mismatch (root: 2192, 
owner: 313792, offset: 0) wanted: 886, have: 1024
ERROR: extent[1289960189952, 1089536] referencer count mismatch (root: 2192, 
owner: 313879, offset: 0) wanted: 3, have: 9
ERROR: extent[1290752475136, 2215936] referencer count mismatch (root: 2192, 
owner: 313932, offset: 0) wanted: 4, have: 17
ERROR: extent[1290786590720, 1318912] referencer count mismatch (root: 2192, 
owner: 313959, offset: 0) wanted: 2, have: 11
ERROR: extent[1290945564672, 1662976] referencer count mismatch (root: 2192, 
owner: 314025, offset: 0) wanted: 6, have: 13
ERROR: extent[1291138732032, 593920] referencer count mismatch (root: 2192, 
owner: 315673, offset: 0) wanted: 1, have: 5
ERROR: extent[1291221585920, 1675264] referencer count mismatch (root: 2192, 
owner: 315837, offset: 0) wanted: 9, have: 13
ERROR: extent[1291272941568, 1454080] referencer count mismatch (root: 2192, 
owner: 315873, offset: 0) wanted: 8, have: 12
ERROR: extent[1291338227712, 2686976] referencer count mismatch (root: 2192, 
owner: 315984, offset: 0) wanted: 5, have: 21
ERROR: extent[1291353747456, 2375680] referencer count mismatch (root: 2192, 
owner: 315990, offset: 0) wanted: 8, have: 19
ERROR: extent[1291470073856, 389120] referencer count mismatch (root: 2192, 
owner: 316139, offset: 0) wanted: 2, have: 3
ERROR: extent[1291477278720, 2109440] referencer count mismatch (root: 2192, 
owner: 316456, offset: 0) wanted: 13, have: 17
ERROR: extent[1291489882112, 134217728] referencer count mismatch (root: 2192, 
owner: 316466, offset: 0) wanted: 969, have: 1024
ERROR: extent[1291647651840, 2347008] referencer count mismatch (root: 2192, 
owner: 316490, offset: 0) wanted: 11, have: 18
ERROR: extent[1291662057472, 2035712] referencer count mismatch (root: 2192, 
owner: 316499, offset: 0) wanted: 13, have: 16
ERROR: extent[1292130070528, 1155072] referencer count mismatch (root: 2192, 
owner: 316627, offset: 0) wanted: 5, have: 9
ERROR: extent[1292336484352, 360448] referencer count mismatch (root: 2192, 
owner: 316719, offset: 0) wanted: 1, have: 3
ERROR: extent[1292668243968, 1474560] referencer count mismatch (root: 2192, 
owner: 316952, offset: 0) wanted: 4, have: 12
ERROR: extent[1292695543808, 1359872] referencer count mismatch (root: 2192, 
owner: 316976, offset: 0) wanted: 10, have: 11
ERROR: extent[1292714188800, 1687552] referencer count mismatch (root: 2192, 
owner: 316988, offset: 0) wanted: 2, have: 13
ERROR: extent[1292765691904, 1769472] referencer count mismatch (root: 2192, 
owner: 317017, offset: 0) wanted: 10, have: 14
ERROR: extent[1292781031424, 892928] referencer count mismatch (root: 2192, 
owner: 317032, offset: 0) wanted: 1, have: 7
ERROR: extent[1292795318272, 929792] referencer count mismatch (root: 2192, 
owner: 317041, offset: 0) wanted: 7, have: 8
ERROR: extent[1292812013568, 2830336] referencer count mismatch (root: 2192, 
owner: 317052, offset: 0) wanted: 11, have: 22
ERROR: extent[1292875067392, 1970176] referencer count mismatch (root: 2192, 
owner: 317098, offset: 0) wanted: 3, have: 16
ERROR: extent[1292889546752, 134217728] referencer count mismatch (root: 2192, 
owner: 317212, offset: 0) wanted: 856, have: 1024
ERROR: extent[1293217169408, 25329664] referencer count mismatch (root: 2192, 
owner: 317212, offset: 310116352) wanted: 59, have: 194
ERROR: extent[1293396553728, 2338816] referencer count mismatch (root: 2192, 
owner: 317168, offset: 0) wanted: 3, have: 18
ERROR: extent[1293473275904, 33972224] referencer count mismatch (root: 2192, 
owner: 317183, offset: 0) wanted: 230, have: 260
ERROR: extent[1293507248128, 134217728] referencer count mismatch (root: 2192, 
owner: 317186, offset: 0) wanted: 883, have: 1024
ERROR: extent[1294790914048, 1032192] referencer count mismatch (root: 2192, 
owner: 314542, offset: 0) wanted: 4, have: 8
ERROR: extent[1295180226560, 2105344] referencer count mismatch (root: 2192, 
owner: 314715, offset: 0) wanted: 3, have: 17
ERROR: extent[1295194308608, 1912832] referencer count mismatch (root: 2192, 
owner: 314732, offset: 0) wanted: 12, have: 15
ERROR: extent[1295208464384, 1626112] referencer count mismatch (root: 2192, 
owner: 314740, offset: 0) wanted: 3, have: 13
ERROR: extent[1295395008512, 68243456] referencer count mismatch (root: 2192, 
owner: 314787, offset: 0) wanted: 203, have: 521
ERROR: extent[1295463251968, 44236800] referencer count mismatch (root: 2192, 
owner: 314742, offset: 134217728) wanted: 294, have: 338
ERROR: extent[1295510691840, 1417216] referencer count mismatch (root: 2192, 
owner: 314797, offset: 0) wanted: 7, have: 11
ERROR: extent[1295590973440, 2424832] referencer count mismatch (root: 2192, 
owner: 314875, offset: 0) wanted: 5, have: 19
ERROR: extent[1295600427008, 82325504] referencer count mismatch (root: 2192, 
owner: 314890, offset: 0) wanted: 566, have: 629
ERROR: extent[1295719088128, 2453504] referencer count mismatch (root: 2192, 
owner: 314911, offset: 0) wanted: 11, have: 19
ERROR: extent[1295735943168, 134217728] referencer count mismatch (root: 2192, 
owner: 314922, offset: 0) wanted: 995, have: 1024
ERROR: extent[1296418197504, 585728] referencer count mismatch (root: 2192, 
owner: 314944, offset: 0) wanted: 3, have: 5
ERROR: extent[1296969801728, 68718592] referencer count mismatch (root: 2192, 
owner: 314933, offset: 0) wanted: 410, have: 525
ERROR: extent[1297821396992, 4706304] referencer count mismatch (root: 2192, 
owner: 315554, offset: 0) wanted: 3, have: 36
ERROR: extent[1297894973440, 507904] referencer count mismatch (root: 2192, 
owner: 317614, offset: 0) wanted: 1, have: 4
ERROR: extent[1297908019200, 2043904] referencer count mismatch (root: 2192, 
owner: 317628, offset: 0) wanted: 3, have: 16
ERROR: extent[1297939410944, 2150400] referencer count mismatch (root: 2192, 
owner: 317661, offset: 0) wanted: 16, have: 17
ERROR: extent[1298589421568, 2215936] referencer count mismatch (root: 2192, 
owner: 317759, offset: 0) wanted: 3, have: 17
ERROR: extent[1298620256256, 30285824] referencer count mismatch (root: 2192, 
owner: 317787, offset: 0) wanted: 127, have: 232
ERROR: extent[1298674737152, 27983872] referencer count mismatch (root: 2192, 
owner: 329099, offset: 0) wanted: 207, have: 214
ERROR: extent[1298702852096, 471040] referencer count mismatch (root: 2192, 
owner: 317815, offset: 0) wanted: 3, have: 4
ERROR: extent[1298703323136, 134217728] referencer count mismatch (root: 2192, 
owner: 329098, offset: 0) wanted: 844, have: 1024
ERROR: extent[1298845536256, 53420032] referencer count mismatch (root: 2192, 
owner: 317816, offset: 134217728) wanted: 310, have: 408
ERROR: extent[1298900983808, 10428416] referencer count mismatch (root: 2192, 
owner: 329096, offset: 0) wanted: 66, have: 80
ERROR: extent[1298900983808, 10428416] referencer count mismatch (root: 2192, 
owner: 317825, offset: 0) wanted: 51, have: 80
ERROR: extent[1298911412224, 36126720] referencer count mismatch (root: 2192, 
owner: 317826, offset: 0) wanted: 117, have: 276
ERROR: extent[1298911412224, 36126720] referencer count mismatch (root: 2192, 
owner: 329095, offset: 0) wanted: 137, have: 276
ERROR: extent[1298953486336, 90873856] referencer count mismatch (root: 2192, 
owner: 317843, offset: 0) wanted: 596, have: 694
ERROR: extent[1298953486336, 90873856] referencer count mismatch (root: 2192, 
owner: 329093, offset: 0) wanted: 521, have: 694
ERROR: extent[1299215028224, 2027520] referencer count mismatch (root: 2192, 
owner: 317878, offset: 0) wanted: 4, have: 16
ERROR: extent[1299275636736, 2654208] referencer count mismatch (root: 2192, 
owner: 317900, offset: 0) wanted: 5, have: 21
ERROR: extent[1299303247872, 4628480] referencer count mismatch (root: 2192, 
owner: 317931, offset: 0) wanted: 7, have: 36
ERROR: extent[1299368595456, 19660800] referencer count mismatch (root: 2192, 
owner: 317850, offset: 134217728) wanted: 88, have: 150
ERROR: extent[1299406565376, 888832] referencer count mismatch (root: 2192, 
owner: 317986, offset: 0) wanted: 6, have: 7
ERROR: extent[1299640987648, 2568192] referencer count mismatch (root: 2192, 
owner: 318047, offset: 0) wanted: 16, have: 20
ERROR: extent[1300195487744, 2138112] referencer count mismatch (root: 2192, 
owner: 318075, offset: 0) wanted: 5, have: 17
ERROR: extent[1300212133888, 27443200] referencer count mismatch (root: 2192, 
owner: 318089, offset: 0) wanted: 190, have: 210
ERROR: extent[1334735675392, 106651648] referencer count mismatch (root: 2192, 
owner: 329091, offset: 0) wanted: 593, have: 814
ERROR: extent[1334842327040, 103424000] referencer count mismatch (root: 2192, 
owner: 329089, offset: 0) wanted: 701, have: 790
ERROR: extent[1386454097920, 1404928] referencer count mismatch (root: 2192, 
owner: 338307, offset: 0) wanted: 2, have: 10
ERROR: extent[1386556035072, 1564672] referencer count mismatch (root: 2192, 
owner: 338195, offset: 0) wanted: 5, have: 11
ERROR: extent[1386676543488, 1310720] referencer count mismatch (root: 2192, 
owner: 340273, offset: 0) wanted: 5, have: 9
ERROR: extent[1405711015936, 3756032] referencer count mismatch (root: 2192, 
owner: 354260, offset: 0) wanted: 2, have: 29
ERROR: extent[1406415671296, 1679360] referencer count mismatch (root: 2192, 
owner: 354255, offset: 0) wanted: 1, have: 13
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
checking csums
checking root refs
found 807241723904 bytes used, error(s) found
total csum bytes: 783568540
total tree bytes: 8539635712
total fs tree bytes: 7533740032
total extent tree bytes: 171425792
btree space waste bytes: 1366949310
file data blocks allocated: 35905640476672
 referenced 6583743541248
[chris@f28s ~]$ 

[chris@f28s ~]$ sudo btrfs insp dump-s /dev/mapper/first
superblock: bytenr=65536, device=/dev/mapper/first
---------------------------------------------------------
csum_type               0 (crc32c)
csum_size               4
csum                    0x93e34c4f [match]
bytenr                  65536
flags                   0x1
                        ( WRITTEN )
magic                   _BHRfS_M [match]
fsid                    0f43f49d-6e63-4b1b-bc8c-c54da409872d
label                   first
generation              17938
root                    644282925056
sys_array_size          129
chunk_root_generation   17923
root_level              1
chunk_root              644073177088
chunk_root_level        1
log_root                0
log_root_transid        0
log_root_level          0
total_bytes             1099509530624
bytes_used              807241723904
sectorsize              4096
nodesize                16384
leafsize (deprecated)           16384
stripesize              4096
root_dir                6
num_devices             1
compat_flags            0x0
compat_ro_flags         0x0
incompat_flags          0x161
                        ( MIXED_BACKREF |
                          BIG_METADATA |
                          EXTENDED_IREF |
                          SKINNY_METADATA )
cache_generation        17938
uuid_tree_generation    17938
dev_item.uuid           85dd7183-60be-4379-859f-c24ceffb1034
dev_item.fsid           0f43f49d-6e63-4b1b-bc8c-c54da409872d [match]
dev_item.type           0
dev_item.total_bytes    1099509530624
dev_item.bytes_used     815037153280
dev_item.io_align       4096
dev_item.io_width       4096
dev_item.sector_size    4096
dev_item.devid          2
dev_item.dev_group      0
dev_item.seek_speed     0
dev_item.bandwidth      0
dev_item.generation     0



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