Hello, Trying to balance a 2TB filesystem on the 3.8.5 kernel:
Label: 'p2' uuid: 01f6cc8b-d305-40e1-bac8-8fdd548f611e
Total devices 1 FS bytes used 1.32TB
devid 1 size 1.80TB used 1.37TB path /dev/sda2
System: total=4.00MB, used=156.00KB
Data+Metadata: total=1.37TB, used=1.32TB
I am getting a Segmentation fault in 'btrfs' utility, and following in dmesg.
What is the problem here?
[12259.667681] btrfs: relocating block group 246973202432 flags 5
[12274.481651] btrfs: found 80 extents
[12284.273736] btrfs: found 1 extents
[12290.803209] btrfs: relocating block group 245899460608 flags 5
[12298.070756] btrfs: found 48 extents
[12304.272924] btrfs: relocating block group 244825718784 flags 5
[12318.361116] btrfs: found 511 extents
[12327.932489] btrfs: found 6 extents
[12335.071480] btrfs: relocating block group 243751976960 flags 5
[12346.588372] btrfs: found 221 extents
[12357.535910] btrfs: found 2 extents
[12363.295088] btrfs: relocating block group 242678235136 flags 5
[12377.999629] btrfs: found 67 extents
[12389.909611] btrfs: found 8 extents
[12397.101725] btrfs: relocating block group 241604493312 flags 5
[12411.303919] btrfs: found 94 extents
[12418.516308] btrfs: relocating block group 240530751488 flags 5
[12432.028091] btrfs: found 176 extents
[12439.785920] btrfs: relocating block group 239457009664 flags 5
[12451.489826] ------------[ cut here ]------------
[12451.489873] WARNING: at fs/btrfs/super.c:256
__btrfs_abort_transaction+0xdf/0x100 [btrfs]()
[12451.489880] Hardware name: KS
[12451.489885] btrfs: Transaction aborted
[12451.489890] Modules linked in: nf_conntrack_ipv6(F) nf_defrag_ipv6(F)
ip6t_REJECT(F) ip6table_filter(F) ip6_tables(F) ipt_REJECT(F) xt_tcpudp(F)
xt_state(F) xt_limit(F) iptable_nat(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F)
nf_nat_ipv4(F) nf_nat(F) nf_conntrack(F) iptable_filter(F) ip_tables(F)
x_tables(F) btrfs(F) zlib_deflate(F) libcrc32c(F) w83627ehf(F) hwmon_vid(F)
coretemp(F) gpio_ich(F) snd_pcm(F) i915(F) snd_timer(F) snd(F) soundcore(F)
snd_page_alloc(F) microcode(F) psmouse(F) tpm_tis(F) drm_kms_helper(F)
pcspkr(F) serio_raw(F) drm(F) lpc_ich(F) i2c_i801(F) r8169(F) i2c_algo_bit(F)
mac_hid(F) video(F)
[12451.489981] Pid: 1053, comm: btrfs Tainted: GF 3.8.5-gnu #1
[12451.489987] Call Trace:
[12451.490006] [<ffffffff81058bef>] warn_slowpath_common+0x7f/0xc0
[12451.490020] [<ffffffff81058ce6>] warn_slowpath_fmt+0x46/0x50
[12451.490064] [<ffffffffa0220b37>] ? free_extent_buffer+0x37/0x90 [btrfs]
[12451.490098] [<ffffffffa01da01f>] __btrfs_abort_transaction+0xdf/0x100
[btrfs]
[12451.490204] [<ffffffffa01e6d8c>] ? insert_tree_block_ref+0x4c/0x70 [btrfs]
[12451.490295] [<ffffffffa01e9908>] __btrfs_inc_extent_ref+0x1b8/0x200 [btrfs]
[12451.490337] [<ffffffffa02450d9>] ? btrfs_merge_delayed_refs+0x289/0x300
[btrfs]
[12451.490408] [<ffffffffa01ef87e>] run_clustered_refs+0x9ce/0xae0 [btrfs]
[12451.490438] [<ffffffffa01dd8bd>] ? btrfs_put_tree_mod_seq+0x10d/0x150
[btrfs]
[12451.490470] [<ffffffffa01f32c0>] btrfs_run_delayed_refs+0xd0/0x2f0 [btrfs]
[12451.490504] [<ffffffffa0203987>] __btrfs_end_transaction+0xf7/0x410 [btrfs]
[12451.490538] [<ffffffffa0203cd3>] btrfs_end_transaction_throttle+0x13/0x20
[btrfs]
[12451.490576] [<ffffffffa024bf34>] merge_reloc_root+0x274/0x500 [btrfs]
[12451.490606] [<ffffffffa01dd32a>] ? btrfs_free_path+0x2a/0x40 [btrfs]
[12451.490698] [<ffffffffa024c2d8>] merge_reloc_roots+0x118/0x150 [btrfs]
[12451.490741] [<ffffffffa024c91b>] relocate_block_group+0x3db/0x640 [btrfs]
[12451.490784] [<ffffffffa024cd45>] btrfs_relocate_block_group+0x1c5/0x300
[btrfs]
[12451.490825] [<ffffffffa02250b5>] btrfs_relocate_chunk.isra.54+0x75/0x730
[btrfs]
[12451.490864] [<ffffffffa021b5e1>] ? release_extent_buffer.isra.26+0x81/0xf0
[btrfs]
[12451.490904] [<ffffffffa0220b37>] ? free_extent_buffer+0x37/0x90 [btrfs]
[12451.490945] [<ffffffffa02294d7>] btrfs_balance+0x8e7/0xe00 [btrfs]
[12451.490988] [<ffffffffa023135f>] btrfs_ioctl_balance+0x22f/0x570 [btrfs]
[12451.491030] [<ffffffffa0233cb0>] btrfs_ioctl+0xee0/0x1b70 [btrfs]
[12451.491045] [<ffffffff811a66a3>] ? user_path_at_empty+0x63/0xa0
[12451.491058] [<ffffffff816d74a0>] ? __do_page_fault+0x240/0x540
[12451.491157] [<ffffffff811a87d8>] do_vfs_ioctl+0x98/0x550
[12451.491182] [<ffffffff81162173>] ? do_brk+0x1b3/0x330
[12451.491191] [<ffffffff811a8d21>] sys_ioctl+0x91/0xb0
[12451.491201] [<ffffffff816dbe1d>] system_call_fastpath+0x1a/0x1f
[12451.491208] ---[ end trace a10e7cae6b920c78 ]---
[12451.491217] BTRFS error (device sda2) in __btrfs_inc_extent_ref:1935: Object
already exists
[12451.494408] btrfs is forced readonly
[12451.495143] ------------[ cut here ]------------
[12451.498178] Kernel BUG at ffffffffa024bdbe [verbose debug info unavailable]
[12451.498178] invalid opcode: 0000 [#1] SMP
[12451.498178] Modules linked in: nf_conntrack_ipv6(F) nf_defrag_ipv6(F)
ip6t_REJECT(F) ip6table_filter(F) ip6_tables(F) ipt_REJECT(F) xt_tcpudp(F)
xt_state(F) xt_limit(F) iptable_nat(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F)
nf_nat_ipv4(F) nf_nat(F) nf_conntrack(F) iptable_filter(F) ip_tables(F)
x_tables(F) btrfs(F) zlib_deflate(F) libcrc32c(F) w83627ehf(F) hwmon_vid(F)
coretemp(F) gpio_ich(F) snd_pcm(F) i915(F) snd_timer(F) snd(F) soundcore(F)
snd_page_alloc(F) microcode(F) psmouse(F) tpm_tis(F) drm_kms_helper(F)
pcspkr(F) serio_raw(F) drm(F) lpc_ich(F) i2c_i801(F) r8169(F) i2c_algo_bit(F)
mac_hid(F) video(F)
[12451.498178] CPU 0
[12451.498178] Pid: 1053, comm: btrfs Tainted: GF W 3.8.5-gnu #1 OVH
KS/D425KT
[12451.498178] RIP: 0010:[<ffffffffa024bdbe>] [<ffffffffa024bdbe>]
merge_reloc_root+0xfe/0x500 [btrfs]
[12451.498178] RSP: 0018:ffff88011c9bb998 EFLAGS: 00010206
[12451.498178] RAX: ffffffffffffffe2 RBX: ffff880114c24cf0 RCX: 0000000000000002
[12451.498178] RDX: 0000000000000000 RSI: ffff88012976e000 RDI: ffff88011a987800
[12451.498178] RBP: ffff88011c9bba58 R08: ffffea00047430c0 R09: 0000000000000000
[12451.498178] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88011a066000
[12451.498178] R13: ffffffffffffffe2 R14: ffff88011a987800 R15: ffff880119ade800
[12451.498178] FS: 00007f116b017760(0000) GS:ffff88012fc00000(0000)
knlGS:0000000000000000
[12451.498178] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[12451.498178] CR2: ffffffffff600400 CR3: 0000000119fed000 CR4: 00000000000007f0
[12451.498178] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[12451.498178] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[12451.498178] Process btrfs (pid: 1053, threadinfo ffff88011c9ba000, task
ffff880128231740)
[12451.498178] Stack:
[12451.498178] ffff880100000002 ffffffffa01dd32a ffff880119ade000
0000000000000000
[12451.498178] 000000021c9bba58 0000e00000000001 ffff88011c9bb9d8
000774ff81350f5b
[12451.498178] 00006c0000000000 080d000000000068 006c000000000000
74000000003cba70
[12451.498178] Call Trace:
[12451.498178] [<ffffffffa01dd32a>] ? btrfs_free_path+0x2a/0x40 [btrfs]
[12451.498178] [<ffffffffa024c2d8>] merge_reloc_roots+0x118/0x150 [btrfs]
[12451.498178] [<ffffffffa024c91b>] relocate_block_group+0x3db/0x640 [btrfs]
[12451.498178] [<ffffffffa024cd45>] btrfs_relocate_block_group+0x1c5/0x300
[btrfs]
[12451.498178] [<ffffffffa02250b5>] btrfs_relocate_chunk.isra.54+0x75/0x730
[btrfs]
[12451.498178] [<ffffffffa021b5e1>] ? release_extent_buffer.isra.26+0x81/0xf0
[btrfs]
[12451.498178] [<ffffffffa0220b37>] ? free_extent_buffer+0x37/0x90 [btrfs]
[12451.498178] [<ffffffffa02294d7>] btrfs_balance+0x8e7/0xe00 [btrfs]
[12451.498178] [<ffffffffa023135f>] btrfs_ioctl_balance+0x22f/0x570 [btrfs]
[12451.498178] [<ffffffffa0233cb0>] btrfs_ioctl+0xee0/0x1b70 [btrfs]
[12451.498178] [<ffffffff811a66a3>] ? user_path_at_empty+0x63/0xa0
[12451.498178] [<ffffffff816d74a0>] ? __do_page_fault+0x240/0x540
[12451.498178] [<ffffffff811a87d8>] do_vfs_ioctl+0x98/0x550
[12451.498178] [<ffffffff81162173>] ? do_brk+0x1b3/0x330
[12451.498178] [<ffffffff811a8d21>] sys_ioctl+0x91/0xb0
[12451.498178] [<ffffffff816dbe1d>] system_call_fastpath+0x1a/0x1f
[12451.498178] Code: 00 00 4c 89 f7 49 89 45 40 49 8b 74 24 18 e8 6a 1d fa ff
85 c0 74 16 83 f8 f5 75 0f 4c 89 f6 4c 89 ef e8 b6 6f fb ff 85 c0 74 b2 <0f> 0b
8b 45 cc 48 8d 55 cc 48 89 de 4c 89 ff 89 85 64 ff ff ff
[12451.498178] RIP [<ffffffffa024bdbe>] merge_reloc_root+0xfe/0x500 [btrfs]
[12451.498178] RSP <ffff88011c9bb998>
[12451.740494] ---[ end trace a10e7cae6b920c79 ]---
--
With respect,
Roman
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