Comment # 10
on bug 897774
from Johannes Obermayr
Still there on openSUSE Tumbleweed with Kernel
kernel-default-4.10.rc2-1.1.g870a2f2.x86_64:
[ 1776.648462] WARNING: CPU: 0 PID: 3813 at ../fs/btrfs/extent-tree.c:6935
__btrfs_free_extent.isra.58+0x7a8/0xe10 [btrfs]
[ 1776.648464] Modules linked in: fuse iscsi_ibft iscsi_boot_sysfs msr btrfs
xor raid6_pq snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi
snd_hda_intel snd_hda_codec btusb snd_hda_core btrtl btbcm snd_hwdep btintel
snd_pcm_oss snd_pcm hid_generic snd_seq usbhid snd_seq_device arc4 ath9k
ath9k_common ath9k_hw ath snd_timer snd_mixer_oss snd mac80211 ath3k bluetooth
cfg80211 eeepc_wmi asus_wmi r8169 mii sp5100_tco soundcore shpchp i2c_piix4
k10temp sparse_keymap rfkill video kvm_amd acpi_cpufreq fjes pcspkr kvm tpm_tis
tpm_tis_core tpm irqbypass ohci_pci ata_generic amdkfd amd_iommu_v2 xhci_pci
xhci_hcd pata_atiixp ohci_hcd ehci_pci ehci_hcd usbcore radeon sr_mod cdrom
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm
drm wmi button sg dm_multipath dm_mod scsi_dh_rdac
[ 1776.648550] scsi_dh_emc scsi_dh_alua
[ 1776.648558] CPU: 0 PID: 3813 Comm: btrfs-transacti Tainted: G W
4.10.0-rc2-1.g870a2f2-default #1
[ 1776.648560] Hardware name: System manufacturer System Product Name/E35M1-I
DELUXE, BIOS 1402 07/26/2012
[ 1776.648562] Call Trace:
[ 1776.648574] dump_stack+0x63/0x83
[ 1776.648580] __warn+0xcb/0xf0
[ 1776.648583] warn_slowpath_null+0x1d/0x20
[ 1776.648616] __btrfs_free_extent.isra.58+0x7a8/0xe10 [btrfs]
[ 1776.648647] ? update_block_group.isra.57+0x51/0x450 [btrfs]
[ 1776.648679] __btrfs_run_delayed_refs+0xb0c/0x1350 [btrfs]
[ 1776.648686] ? kmem_cache_alloc+0xa3/0x580
[ 1776.648717] btrfs_run_delayed_refs+0x8a/0x2a0 [btrfs]
[ 1776.648752] commit_cowonly_roots+0xd5/0x2e0 [btrfs]
[ 1776.648790] ? btrfs_qgroup_account_extents+0x75/0x170 [btrfs]
[ 1776.648825] btrfs_commit_transaction+0x380/0x980 [btrfs]
[ 1776.648860] transaction_kthread+0x177/0x1b0 [btrfs]
[ 1776.648864] kthread+0x101/0x140
[ 1776.648897] ? btrfs_cleanup_transaction+0x520/0x520 [btrfs]
[ 1776.648901] ? kthread_create_on_node+0x40/0x40
[ 1776.648904] ret_from_fork+0x25/0x30
[ 1776.648907] ---[ end trace d31c8d02d7758ac5 ]---
[ 1776.648914] BTRFS info (device sda2): leaf 4206592 total ptrs 38 free space
2052
[ 1776.648918] item 0 key (37601935360 192 1073741824) itemoff 3971 itemsize
24
[ 1776.648920] block group used 0
[ 1776.648923] item 1 key (38675677184 192 1073741824) itemoff 3947 itemsize
24
[ 1776.648924] block group used 0
[ 1776.648926] item 2 key (39749419008 192 1073741824) itemoff 3923 itemsize
24
[ 1776.648927] block group used 0
[ 1776.648930] item 3 key (40823160832 192 1073741824) itemoff 3899 itemsize
24
[ 1776.648931] block group used 0
[ 1776.648933] item 4 key (41896902656 192 1073741824) itemoff 3875 itemsize
24
[ 1776.648934] block group used 0
[ 1776.648936] item 5 key (42970644480 192 1073741824) itemoff 3851 itemsize
24
[ 1776.648937] block group used 0
[ 1776.648939] item 6 key (44044386304 192 1073741824) itemoff 3827 itemsize
24
[ 1776.648941] block group used 0
[ 1776.648943] item 7 key (45118128128 192 1073741824) itemoff 3803 itemsize
24
[ 1776.648944] block group used 0
[ 1776.648946] item 8 key (46191869952 192 1073741824) itemoff 3779 itemsize
24
[ 1776.648947] block group used 0
[ 1776.648949] item 9 key (47265611776 192 1073741824) itemoff 3755 itemsize
24
[ 1776.648950] block group used 0
[ 1776.648952] item 10 key (48339353600 192 1073741824) itemoff 3731 itemsize
24
[ 1776.648953] block group used 0
[ 1776.648956] item 11 key (49413095424 192 1073741824) itemoff 3707 itemsize
24
[ 1776.648957] block group used 0
[ 1776.648959] item 12 key (50486837248 192 1073741824) itemoff 3683 itemsize
24
[ 1776.648960] block group used 0
[ 1776.648962] item 13 key (51560579072 192 1073741824) itemoff 3659 itemsize
24
[ 1776.648963] block group used 0
[ 1776.648966] item 14 key (52634320896 192 1073741824) itemoff 3635 itemsize
24
[ 1776.648967] block group used 0
[ 1776.648969] item 15 key (53708062720 192 1073741824) itemoff 3611 itemsize
24
[ 1776.648970] block group used 0
[ 1776.648972] item 16 key (54781804544 192 1073741824) itemoff 3587 itemsize
24
[ 1776.648973] block group used 0
[ 1776.648975] item 17 key (55855546368 192 1073741824) itemoff 3563 itemsize
24
[ 1776.648976] block group used 0
[ 1776.648979] item 18 key (56929288192 192 1073741824) itemoff 3539 itemsize
24
[ 1776.648980] block group used 0
[ 1776.648982] item 19 key (58003030016 192 1073741824) itemoff 3515 itemsize
24
[ 1776.648983] block group used 0
[ 1776.648985] item 20 key (59076771840 192 1073741824) itemoff 3491 itemsize
24
[ 1776.648986] block group used 0
[ 1776.648988] item 21 key (60150513664 192 1073741824) itemoff 3467 itemsize
24
[ 1776.648989] block group used 0
[ 1776.648991] item 22 key (61224255488 192 1073741824) itemoff 3443 itemsize
24
[ 1776.648992] block group used 0
[ 1776.648995] item 23 key (62297997312 192 1073741824) itemoff 3419 itemsize
24
[ 1776.648996] block group used 0
[ 1776.648998] item 24 key (63371739136 192 1073741824) itemoff 3395 itemsize
24
[ 1776.648999] block group used 0
[ 1776.649001] item 25 key (64445480960 192 1073741824) itemoff 3371 itemsize
24
[ 1776.649002] block group used 0
[ 1776.649004] item 26 key (65519222784 192 1073741824) itemoff 3347 itemsize
24
[ 1776.649005] block group used 0
[ 1776.649007] item 27 key (66592964608 192 1073741824) itemoff 3323 itemsize
24
[ 1776.649008] block group used 0
[ 1776.649011] item 28 key (67666706432 192 8388608) itemoff 3299 itemsize 24
[ 1776.649012] block group used 28672
[ 1776.649014] item 29 key (67666710528 168 4096) itemoff 3248 itemsize 51
[ 1776.649016] extent refs 1 gen 386003 flags 2
[ 1776.649019] tree block key (18446744073709551605 0 10758389760)
level 0
[ 1776.649020] tree block backref root 1
[ 1776.649023] item 30 key (67666714624 168 4096) itemoff 3197 itemsize 51
[ 1776.649024] extent refs 1 gen 386003 flags 2
[ 1776.649026] tree block key (0 0 0) level 0
[ 1776.649028] tree block backref root 18446744073709551607
[ 1776.649030] item 31 key (67666739200 168 4096) itemoff 3146 itemsize 51
[ 1776.649031] extent refs 1 gen 386004 flags 2
[ 1776.649033] tree block key (0 192 4194304) level 0
[ 1776.649034] tree block backref root 1
[ 1776.649037] item 32 key (67675095040 192 8388608) itemoff 3122 itemsize 24
[ 1776.649038] block group used 0
[ 1776.649040] item 33 key (67683483648 192 8388608) itemoff 3098 itemsize 24
[ 1776.649041] block group used 0
[ 1776.649043] item 34 key (67691872256 192 8388608) itemoff 3074 itemsize 24
[ 1776.649044] block group used 0
[ 1776.649046] item 35 key (67700260864 192 8388608) itemoff 3050 itemsize 24
[ 1776.649047] block group used 0
[ 1776.649050] item 36 key (67708649472 192 8388608) itemoff 3026 itemsize 24
[ 1776.649051] block group used 0
[ 1776.649053] item 37 key (67717038080 192 8388608) itemoff 3002 itemsize 24
[ 1776.649054] block group used 0
[ 1776.649057] BTRFS error (device sda2): unable to find ref byte nr
67676614656 parent 0 root 4 owner 1 offset 0
[ 1776.649059] ------------[ cut here ]------------
[ 1776.649091] WARNING: CPU: 0 PID: 3813 at ../fs/btrfs/extent-tree.c:6941
__btrfs_free_extent.isra.58+0x809/0xe10 [btrfs]
[ 1776.649093] BTRFS: Transaction aborted (error -2)
[ 1776.649094] Modules linked in: fuse iscsi_ibft iscsi_boot_sysfs msr btrfs
xor raid6_pq snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi
snd_hda_intel snd_hda_codec btusb snd_hda_core btrtl btbcm snd_hwdep btintel
snd_pcm_oss snd_pcm hid_generic snd_seq usbhid snd_seq_device arc4 ath9k
ath9k_common ath9k_hw ath snd_timer snd_mixer_oss snd mac80211 ath3k bluetooth
cfg80211 eeepc_wmi asus_wmi r8169 mii sp5100_tco soundcore shpchp i2c_piix4
k10temp sparse_keymap rfkill video kvm_amd acpi_cpufreq fjes pcspkr kvm tpm_tis
tpm_tis_core tpm irqbypass ohci_pci ata_generic amdkfd amd_iommu_v2 xhci_pci
xhci_hcd pata_atiixp ohci_hcd ehci_pci ehci_hcd usbcore radeon sr_mod cdrom
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm
drm wmi button sg dm_multipath dm_mod scsi_dh_rdac
[ 1776.649151] scsi_dh_emc scsi_dh_alua
[ 1776.649156] CPU: 0 PID: 3813 Comm: btrfs-transacti Tainted: G W
4.10.0-rc2-1.g870a2f2-default #1
[ 1776.649157] Hardware name: System manufacturer System Product Name/E35M1-I
DELUXE, BIOS 1402 07/26/2012
[ 1776.649158] Call Trace:
[ 1776.649162] dump_stack+0x63/0x83
[ 1776.649165] __warn+0xcb/0xf0
[ 1776.649169] warn_slowpath_fmt+0x4f/0x60
[ 1776.649200] __btrfs_free_extent.isra.58+0x809/0xe10 [btrfs]
[ 1776.649231] ? update_block_group.isra.57+0x51/0x450 [btrfs]
[ 1776.649263] __btrfs_run_delayed_refs+0xb0c/0x1350 [btrfs]
[ 1776.649267] ? kmem_cache_alloc+0xa3/0x580
[ 1776.649299] btrfs_run_delayed_refs+0x8a/0x2a0 [btrfs]
[ 1776.649333] commit_cowonly_roots+0xd5/0x2e0 [btrfs]
[ 1776.649371] ? btrfs_qgroup_account_extents+0x75/0x170 [btrfs]
[ 1776.649405] btrfs_commit_transaction+0x380/0x980 [btrfs]
[ 1776.649440] transaction_kthread+0x177/0x1b0 [btrfs]
[ 1776.649443] kthread+0x101/0x140
[ 1776.649477] ? btrfs_cleanup_transaction+0x520/0x520 [btrfs]
[ 1776.649480] ? kthread_create_on_node+0x40/0x40
[ 1776.649483] ret_from_fork+0x25/0x30
[ 1776.649486] ---[ end trace d31c8d02d7758ac6 ]---
[ 1776.649490] BTRFS: error (device sda2) in __btrfs_free_extent:6941: errno=-2
No such entry
[ 1776.649492] BTRFS info (device sda2): forced readonly
[ 1776.649497] BTRFS: error (device sda2) in btrfs_run_delayed_refs:2953:
errno=-2 No such entry
[ 1776.649500] BTRFS warning (device sda2): Skipping commit of aborted
transaction.
[ 1776.649503] BTRFS: error (device sda2) in cleanup_transaction:1872: errno=-2
No such entry
$ gdb btrfsck --batch -ex "set args /dev/sda2" -ex "run" -ex "bt full"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Checking filesystem on /dev/sda2
UUID: 9e12d35c-87ab-47e3-aecb-01f7c09e3c96
parent transid verify failed on 67666722816 wanted 385998 found 386004
Ignoring transid failure
Program received signal SIGSEGV, Segmentation fault.
__memcpy_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:102
102 movdqu (%rsi), %xmm0
#0 __memcpy_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:102
No locals.
#1 0x000000000042de5f in check_chunks_and_extents (root=root@entry=0x6bb1f0)
at cmds-check.c:8536
offset = <optimized out>
dev_cache = {rb_node = 0x0}
chunk_cache = {root = {rb_node = 0x0}}
block_group_cache = {tree = {root = {rb_node = 0x0}}, block_groups =
{next = 0x7fffffffd608, prev = 0x7fffffffd608}}
dev_extent_cache = {tree = {root = {rb_node = 0x0}}, no_chunk_orphans =
{next = 0x7fffffffd628, prev = 0x7fffffffd628}, no_device_orphans = {next =
0x7fffffffd638, prev = 0x7fffffffd638}}
extent_cache = {root = {rb_node = 0x0}}
seen = {root = {rb_node = 0x0}}
pending = {root = {rb_node = 0x0}}
reada = {root = {rb_node = 0x0}}
nodes = {root = {rb_node = 0x0}}
excluded_extents = {state = {root = {rb_node = 0x0}}, cache = {root =
{rb_node = 0x0}}, lru = {next = 0x7fffffffd660, prev = 0x7fffffffd660},
cache_size = 0}
corrupt_blocks = {root = {rb_node = 0x0}}
path = {nodes = {0x6b2630, 0x6b2630, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
slots = {33, 29, 0, 0, 0, 0, 0, 0}, locks = {0, 0, 0, 0, 0, 0, 0, 0}, reada =
0, lowest_level = 0, search_for_split = 0, skip_check_block = 0}
key = {objectid = 0, type = 132 '\204', offset = 0}
found_key = {objectid = 2253, type = <optimized out>, offset =
<optimized out>}
ret = <optimized out>
err = <optimized out>
bits = <optimized out>
leaf = 0x6b2630
slot = <optimized out>
ri = {inode = {generation = 1, transid = 0, size = 3, nbytes = 4096,
block_group = 0, nlink = 1, uid = 0, gid = 0, mode = 16877, rdev = 0, flags =
18446744071562067968, sequence = 0, reserved = {0, 0, 0, 0}, atime = {sec = 0,
nsec = 0}, ctime = {sec = 0, nsec = 0}, mtime = {sec = 0, nsec = 0}, otime =
{sec = 0, nsec = 0}}, generation = 131146, root_dirid = 256, bytenr =
21056712704, byte_limit = 0, bytes_used = 242896896, last_snapshot = 131145,
flags = 1, refs = 1, drop_progress = {objectid = 0, type = 0 '\000', offset =
0}, drop_level = 0 '\000', level = 3 '\003', generation_v2 = 131146, uuid =
"|\265\245\345\266r\fB\272\201��\321���", parent_uuid = '\000' <repeats 15 times>,
received_uuid = '\000' <repeats 15 times>, ctransid = 131145, otransid =
131145, stransid = 0, rtransid = 0, ctime = {sec = 1397824883, nsec =
949234324}, otime = {sec = 1397824884, nsec = 7233596}, stime = {sec = 0, nsec
= 0}, rtime = {sec = 0, nsec = 0}, reserved = {0, 0, 0, 0, 0, 0, 0, 0}}
dropping_trees = {next = 0x7fffffffd590, prev = 0x7fffffffd590}
normal_trees = {next = 0x6ac1d0, prev = 0x6c2a40}
root1 = <optimized out>
objectid = <optimized out>
level_size = <optimized out>
#2 0x0000000000430424 in cmd_check (argc=<optimized out>, argv=<optimized
out>) at cmds-check.c:11509
root_cache = {root = {rb_node = 0x0}}
root = 0x6bb1f0
info = 0x6ad3a0
bytenr = <optimized out>
subvolid = <optimized out>
tree_root_bytenr = <optimized out>
chunk_root_bytenr = <optimized out>
uuidbuf = "9e12d35c-87ab-47e3-aecb-01f7c09e3c96"
ret = <optimized out>
num = <optimized out>
init_csum_tree = <optimized out>
readonly = <optimized out>
qgroup_report = 0
qgroups_repaired = 0
ctree_flags = <optimized out>
#3 0x000000000040b96b in main (argc=2, argv=0x7fffffffdde8) at btrfs.c:243
cmd = 0x6a4858 <btrfs_cmd_group+216>
bname = <optimized out>
ret = <optimized out>