Got this with 4.0.0-rc5 when doing a degraded mount:
Mar 23 13:09:22 server1 kernel: [ 665.197957] BTRFS info (device sdb4):
allowing degraded mounts
Mar 23 13:09:22 server1 kernel: [ 665.198030] BTRFS info (device sdb4):
disk space caching is enabled
Mar 23 13:09:22 server1 kernel: [ 665.213163] BTRFS warning (device
sdb4): devid 2 missing
Mar 23 13:09:22 server1 kernel: [ 665.260077] BTRFS: bdev (null) errs:
wr 1, rd 1, flush 0, corrupt 0, gen 0
Mar 23 13:10:01 server1 kernel: [ 704.310874] ------------[ cut here
]------------
Mar 23 13:10:01 server1 kernel: [ 704.310936] WARNING: CPU: 1 PID: 4706
at fs/btrfs/free-space-cache.c:1349 tree_insert_offset+0x7d/0xc3
[btrfs]()
Mar 23 13:10:01 server1 kernel: [ 704.310989] Modules linked in: ipv6
cpufreq_stats cpufreq_powersave cpufreq_conservative btrfs xor raid6_pq
zlib_deflate ext3 jbd loop 8250_fintek i2c_i801 parport_pc tpm_infineon
tpm_tis tpm lpc_ich ehci_pci ehci_hcd mfd_core i2c_core parport pcspkr
acpi_cpufreq button video ext4 crc16 jbd2 mbcache raid1 sg sd_mod ahci
libahci libata scsi_mod r8169 mii
Mar 23 13:10:01 server1 kernel: [ 704.312632] CPU: 1 PID: 4706 Comm:
btrfs-transacti Not tainted 4.0.0-rc5 #1
Mar 23 13:10:01 server1 kernel: [ 704.312680] Hardware name: System
manufacturer System Product Name/P8H67-M PRO, BIOS 1106 10/17/2011
Mar 23 13:10:01 server1 kernel: [ 704.312732] 0000000000000009
ffff880819917c18 ffffffff813c2f57 ffff88083fa4d801
Mar 23 13:10:01 server1 kernel: [ 704.312928] 0000000000000000
ffff880819917c58 ffffffff8103b031 ffff880036eb9540
Mar 23 13:10:01 server1 kernel: [ 704.313124] ffffffffa03126f6
00000000ffffffef ffff880036eb9540 000001dd651b4000
Mar 23 13:10:01 server1 kernel: [ 704.313321] Call Trace:
Mar 23 13:10:01 server1 kernel: [ 704.313394] [<ffffffff813c2f57>]
dump_stack+0x45/0x57
Mar 23 13:10:01 server1 kernel: [ 704.313469] [<ffffffff8103b031>]
warn_slowpath_common+0x97/0xb1
Mar 23 13:10:01 server1 kernel: [ 704.313551] [<ffffffffa03126f6>] ?
tree_insert_offset+0x7d/0xc3 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.313627] [<ffffffff8103b060>]
warn_slowpath_null+0x15/0x17
Mar 23 13:10:01 server1 kernel: [ 704.313707] [<ffffffffa03126f6>]
tree_insert_offset+0x7d/0xc3 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.313788] [<ffffffffa0313142>]
link_free_space+0x27/0x3c [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.313868] [<ffffffffa03143cb>]
__btrfs_add_free_space+0x354/0x39d [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.313952] [<ffffffffa02f2864>] ?
free_extent_state.part.29+0x34/0x39 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314062] [<ffffffffa02f2864>] ?
free_extent_state.part.29+0x34/0x39 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314170] [<ffffffffa02c16b4>] ?
block_group_cache_tree_search+0x8e/0xbd [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314279] [<ffffffffa02c5518>]
unpin_extent_range.isra.78+0xa6/0x199 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314387] [<ffffffffa02c9aa2>]
btrfs_finish_extent_commit+0xcb/0xea [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314497] [<ffffffffa02dbc57>]
btrfs_commit_transaction+0x850/0x9e1 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314606] [<ffffffffa02d9bf0>]
transaction_kthread+0xef/0x1c3 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314687] [<ffffffffa02d9b01>] ?
open_ctree+0x1d47/0x1d47 [btrfs]
Mar 23 13:10:01 server1 kernel: [ 704.314763] [<ffffffff810501a3>]
kthread+0xcd/0xd5
Mar 23 13:10:01 server1 kernel: [ 704.314836] [<ffffffff810500d6>] ?
kthread_freezable_should_stop+0x43/0x43
Mar 23 13:10:01 server1 kernel: [ 704.314913] [<ffffffff813c7848>]
ret_from_fork+0x58/0x90
Mar 23 13:10:01 server1 kernel: [ 704.314987] [<ffffffff810500d6>] ?
kthread_freezable_should_stop+0x43/0x43
Mar 23 13:10:01 server1 kernel: [ 704.315063] ---[ end trace
695f505b58a81c8d ]---
Mar 23 13:10:01 server1 kernel: [ 704.315135] BTRFS: unable to add free
space :-17
Mar 23 13:10:33 server1 kernel: [ 736.510895] BTRFS: unable to add free
space :-17
Mar 23 13:11:03 server1 kernel: [ 765.780069] BTRFS: unable to add free
space :-17
Mar 23 13:11:13 server1 kernel: [ 776.030671] BTRFS: unable to add free
space :-17
Mar 23 13:12:39 server1 kernel: [ 861.791031] BTRFS: unable to add free
space :-17
Mar 23 13:13:29 server1 kernel: [ 911.761852] BTRFS: unable to add free
space :-17
Mar 23 13:13:53 server1 kernel: [ 936.124674] BTRFS: unable to add free
space :-17
--
Tomasz Chmielewski
http://www.sslrack.com
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