Got the following with 3.17-rc3 and running balance (had to power cycle
after that):
[ 1329.952600] ------------[ cut here ]------------
[ 1329.952671] WARNING: CPU: 7 PID: 3106 at fs/btrfs/extent-tree.c:876
btrfs_lookup_extent_info+0x377/0x3eb [btrfs]()
[ 1329.952726] Modules linked in: ipt_MASQUERADE iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
ip_tables x_tables cpufreq_ondemand cpufreq_conservative
cpufreq_powersave cpufreq_stats bridge stp llc ipv6 btrfs xor raid6_pq
zlib_deflate coretemp hwmon loop parport_pc parport pcspkr i2c_i801
tpm_infineon tpm_tis tpm i2ccore video battery lpc_ich mfd_core ehci_pci
ehci_hcd button acpi_cpufreq ext4 crc16 jbd2 mbcache raid1 sg sd_mod
ahci libahci libata scsi_mod r8169 mii
[ 1329.954740] CPU: 7 PID: 3106 Comm: btrfs-balance Not tainted
3.17.0-rc3 #1
[ 1329.954789] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[ 1329.954841] 0000000000000009 ffff880733d4f8d8 ffffffff813ab092
0000000000000000
[ 1329.955030] 0000000000000000 ffff880733d4f918 ffffffff81039b41
ffffffff00000007
[ 1329.955219] ffffffffa02d8560 ffff8807aa536120 0000000000000000
0000000000000000
[ 1329.955407] Call Trace:
[ 1329.955455] [<ffffffff813ab092>] dump_stack+0x46/0x58
[ 1329.955503] [<ffffffff81039b41>] warn_slowpath_common+0x77/0x91
[ 1329.955610] [<ffffffffa02d8560>] ?
btrfs_lookup_extent_info+0x377/0x3eb [btrfs]
[ 1329.955758] [<ffffffff81039b70>] warn_slowpath_null+0x15/0x17
[ 1329.955862] [<ffffffffa02d8560>]
btrfs_lookup_extent_info+0x377/0x3eb [btrfs]
[ 1329.956018] [<ffffffffa02d8c8f>] walk_down_proc+0xc5/0x22b [btrfs]
[ 1329.956128] [<ffffffffa02ebd20>] ?
join_transaction.isra.30+0x24/0x309 [btrfs]
[ 1329.956285] [<ffffffffa02dae92>] walk_down_tree+0x45/0xd5 [btrfs]
[ 1329.956391] [<ffffffffa02dd89a>] btrfs_drop_snapshot+0x2f5/0x68f
[btrfs]
[ 1329.956505] [<ffffffffa032e19d>] merge_reloc_roots+0x139/0x23f
[btrfs]
[ 1329.956617] [<ffffffffa032e8f6>] relocate_block_group+0x466/0x4de
[btrfs]
[ 1329.956728] [<ffffffffa032eac6>]
btrfs_relocate_block_group+0x158/0x278 [btrfs]
[ 1329.956890] [<ffffffffa030b6f0>]
btrfs_relocate_chunk.isra.62+0x58/0x5f7 [btrfs]
[ 1329.957073] [<ffffffffa031a8d7>] ?
btrfs_set_lock_blocking_rw+0x68/0x95 [btrfs]
[ 1329.957214] [<ffffffffa02cbb04>] ? btrfs_set_path_blocking+0x23/0x54
[btrfs]
[ 1329.957297] [<ffffffffa02d0517>] ? btrfs_search_slot+0x7bc/0x816
[btrfs]
[ 1329.957382] [<ffffffffa0307bd5>] ? free_extent_buffer+0x6f/0x7c
[btrfs]
[ 1329.957467] [<ffffffffa030e5cd>] btrfs_balance+0xa7b/0xc80 [btrfs]
[ 1329.957547] [<ffffffff813a8e15>] ? printk+0x48/0x4a
[ 1329.957629] [<ffffffffa030e829>] balance_kthread+0x57/0x7c [btrfs]
[ 1329.957724] [<ffffffffa030e7d2>] ? btrfs_balance+0xc80/0xc80 [btrfs]
[ 1329.957807] [<ffffffffa030e7d2>] ? btrfs_balance+0xc80/0xc80 [btrfs]
[ 1329.957887] [<ffffffff8104e993>] kthread+0xcd/0xd5
[ 1329.957965] [<ffffffff8104e8c6>] ?
kthread_freezable_should_stop+0x43/0x43
[ 1329.958045] [<ffffffff813afcec>] ret_from_fork+0x7c/0xb0
[ 1329.958122] [<ffffffff8104e8c6>] ?
kthread_freezable_should_stop+0x43/0x43
[ 1329.958210] ---[ end trace a368b0643f9207e2 ]---
[ 1329.958293] ------------[ cut here ]------------
[ 1329.958378] kernel BUG at fs/btrfs/extent-tree.c:7727!
[ 1329.958455] invalid opcode: 0000 [#1] SMP
[ 1329.958593] Modules linked in: ipt_MASQUERADE iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
ip_tables x_tables cpufreq_ondemand cpufreq_conservative
cpufreq_powersave cpufreq_stats bridge stp llc ipv6 btrfs xor raid6_pq
zlib_deflate coretemp hwmon loop parport_pc parport pcspkr i2c_i801
tpm_infineon tpm_tis tpm i2ccore video battery lpc_ich mfd_core ehci_pci
ehci_hcd button acpi_cpufreq ext4 crc16 jbd2 mbcache raid1 sg sd_mod
ahci libahci libata scsi_mod r8169 mii
[ 1329.960684] CPU: 7 PID: 3106 Comm: btrfs-balance Tainted: G W
3.17.0-rc3 #1
[ 1329.960803] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[ 1329.960924] task: ffff8807f18c0000 ti: ffff880733d4c000 task.ti:
ffff880733d4c000
[ 1329.961043] RIP: 0010:[<ffffffffa02d8ca6>] [<ffffffffa02d8ca6>]
walk_down_proc+0xdc/0x22b [btrfs]
[ 1329.961200] RSP: 0018:ffff880733d4f9e8 EFLAGS: 00010246
[ 1329.961277] RAX: 0000000000000000 RBX: 0000000000000002 RCX:
00000000000f5a50
[ 1329.961356] RDX: 00000000000f5a4f RSI: ffff88081fbd9650 RDI:
0000000000019650
[ 1329.961436] RBP: ffff880733d4fa38 R08: ffffea001ea94d80 R09:
00000000000009a2
[ 1329.961515] R10: ffffffffa02cbc38 R11: 0000000000000000 R12:
ffff8807aa536d80
[ 1329.961594] R13: ffff880733ac5600 R14: ffff880660ba65c8 R15:
0000000000000002
[ 1329.961674] FS: 0000000000000000(0000) GS:ffff88081fbc0000(0000)
knlGS:0000000000000000
[ 1329.961794] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1329.961872] CR2: 00007f7fa0c3e000 CR3: 0000000001611000 CR4:
00000000001407e0
[ 1329.961951] Stack:
[ 1329.962024] ffff880733ac5650 ffffffffa02ebd20 ffff880732a34820
ffff8807eb201000
[ 1329.962267] 0000000000000000 ffff8807aa536d80 0000000000000002
ffff880732a34820
[ 1329.962510] ffff8807eb201000 ffff880733ac5600 ffff880733d4fa98
ffffffffa02dae92
[ 1329.962754] Call Trace:
[ 1329.962834] [<ffffffffa02ebd20>] ?
join_transaction.isra.30+0x24/0x309 [btrfs]
[ 1329.962957] [<ffffffffa02dae92>] walk_down_tree+0x45/0xd5 [btrfs]
[ 1329.963040] [<ffffffffa02dd89a>] btrfs_drop_snapshot+0x2f5/0x68f
[btrfs]
[ 1329.963126] [<ffffffffa032e19d>] merge_reloc_roots+0x139/0x23f
[btrfs]
[ 1329.963210] [<ffffffffa032e8f6>] relocate_block_group+0x466/0x4de
[btrfs]
[ 1329.963295] [<ffffffffa032eac6>]
btrfs_relocate_block_group+0x158/0x278 [btrfs]
[ 1329.963419] [<ffffffffa030b6f0>]
btrfs_relocate_chunk.isra.62+0x58/0x5f7 [btrfs]
[ 1329.963544] [<ffffffffa031a8d7>] ?
btrfs_set_lock_blocking_rw+0x68/0x95 [btrfs]
[ 1329.963666] [<ffffffffa02cbb04>] ? btrfs_set_path_blocking+0x23/0x54
[btrfs]
[ 1329.963749] [<ffffffffa02d0517>] ? btrfs_search_slot+0x7bc/0x816
[btrfs]
[ 1329.963834] [<ffffffffa0307bd5>] ? free_extent_buffer+0x6f/0x7c
[btrfs]
[ 1329.963918] [<ffffffffa030e5cd>] btrfs_balance+0xa7b/0xc80 [btrfs]
[ 1329.963998] [<ffffffff813a8e15>] ? printk+0x48/0x4a
[ 1329.964080] [<ffffffffa030e829>] balance_kthread+0x57/0x7c [btrfs]
[ 1329.964163] [<ffffffffa030e7d2>] ? btrfs_balance+0xc80/0xc80 [btrfs]
[ 1329.964246] [<ffffffffa030e7d2>] ? btrfs_balance+0xc80/0xc80 [btrfs]
[ 1329.964326] [<ffffffff8104e993>] kthread+0xcd/0xd5
[ 1329.964404] [<ffffffff8104e8c6>] ?
kthread_freezable_should_stop+0x43/0x43
[ 1329.964484] [<ffffffff813afcec>] ret_from_fork+0x7c/0xb0
[ 1329.964562] [<ffffffff8104e8c6>] ?
kthread_freezable_should_stop+0x43/0x43
[ 1329.964641] Code: b8 01 00 00 00 4c 89 f9 48 89 04 24 49 8b 16 e8 5a
f5 ff ff 83 f8 f4 75 02 0f 0b 85 c0 0f 85 48 01 00 00 4b 83 7c fd 00 00
75 02 <0f> 0b 41 83 bd 94 00 00 00 01 48 63 c3 75 2d 49 83 7c c5 00 01
[ 1329.966842] RIP [<ffffffffa02d8ca6>] walk_down_proc+0xdc/0x22b
[btrfs]
[ 1329.966956] RSP <ffff880733d4f9e8>
[ 1329.967040] ---[ end trace a368b0643f9207e3 ]---
--
Tomasz Chmielewski
http://www.sslrack.com
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