Just tried to remove a broken disk, which ended in segmentation fault
and kernel BUG.
Any advice what to do next? This is on 3.11.0-rc7.
# btrfs device delete missing /home
(after a few minutes)
Segmentation fault
# btrfs fi show
Label: 'test-btrfs' uuid: 60f1759c-45f6-4484-9f60-66a4e9bbf2b6
Total devices 3 FS bytes used 1.19TB
devid 4 size 2.56TB used 0.00 path /dev/sda4
devid 3 size 2.56TB used 1.19TB path /dev/sdb4
*** Some devices missing
Btrfs v0.20-rc1-324-g650e656
[ 262.810201] device label crawler-btrfs devid 3 transid 97972
/dev/sdb4
[ 262.810685] btrfs: allowing degraded mounts
[ 262.810739] btrfs: force zlib compression
[ 262.810789] btrfs: disk space caching is enabled
[ 262.901838] btrfs: bdev (null) errs: wr 0, rd 2, flush 0, corrupt 0,
gen 0
[ 552.010306] btrfs: relocating block group 3955761348608 flags 17
[ 926.802956] btrfs: found 2364 extents
[ 1171.285213] btrfs: found 2084 extents
[ 1304.978086] btrfs: relocating block group 3954687606784 flags 17
[ 1457.655947] btrfs: found 6491 extents
[ 1488.556627] ------------[ cut here ]------------
[ 1488.556683] kernel BUG at fs/btrfs/relocation.c:1055!
[ 1488.556735] invalid opcode: 0000 [#1] SMP
[ 1488.556866] Modules linked in: tun cpufreq_powersave cpufreq_ondemand
cpufreq_conservative cpufreq_stats ipv6 btrfs zlib_deflate ext3 jbd loop
ehci_pci ehci_hcd pcspkr i2c_i801 lpc_ich i2c_core mfd_core acpi_cpufreq
mperf button video ext4 crc16 jbd2 mbcache freq_table aacraid 3w_9xxx
3w_xxxx raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
async_tx xor raid6_pq raid1 raid0 sata_nv sata_sil sata_via sg sd_mod
ahci libahci libata scsi_mod r8169 mii
[ 1488.559137] CPU: 1 PID: 4563 Comm: btrfs Not tainted 3.11.0-rc7 #1
[ 1488.559243] Hardware name: System manufacturer System Product
Name/P8H67-M PRO, BIOS 1106 10/17/2011
[ 1488.559408] task: ffff8808040416e0 ti: ffff8807f9e22000 task.ti:
ffff8807f9e22000
[ 1488.559569] RIP: 0010:[<ffffffffa035f729>] [<ffffffffa035f729>]
build_backref_tree+0xb10/0xe91 [btrfs]
[ 1488.559793] RSP: 0018:ffff8807f9e23928 EFLAGS: 00010246
[ 1488.559898] RAX: ffff8807f9e23900 RBX: ffff8807f9e239a0 RCX:
ffff8807ffd73d50
[ 1488.560006] RDX: ffff8807f9e239a0 RSI: ffff8807ffd73d40 RDI:
ffff880813fa0700
[ 1488.560113] RBP: ffff8807f9e23a18 R08: ffff880813fa0780 R09:
0000000000001000
[ 1488.560221] R10: 0000000000001000 R11: 0000160000000000 R12:
0000000000000000
[ 1488.560329] R13: ffff8807ffd73d50 R14: ffff8807f9e239b0 R15:
ffff880800620800
[ 1488.560437] FS: 00007f3c96d2a740(0000) GS:ffff88083fa40000(0000)
knlGS:0000000000000000
[ 1488.560599] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1488.560703] CR2: 00007f5c7209d680 CR3: 00000007e867c000 CR4:
00000000000407e0
[ 1488.560810] Stack:
[ 1488.560908] 0000000000000000 ffff880813fa0300 ffff880813fa0700
ffff8807ffd73aa0
[ 1488.561230] ffff880800620924 ffff880800620924 ffff880800620920
ffff880800620820
[ 1488.561552] ffff88080fb6b1b0 ffff88080fb6b000 ffff880813fa0e80
ffff8807f9e239a0
[ 1488.561874] Call Trace:
[ 1488.561988] [<ffffffffa036027c>] relocate_tree_blocks+0x1c0/0x544
[btrfs]
[ 1488.562103] [<ffffffffa0303fdb>] ? btrfs_release_path+0x6b/0x8a
[btrfs]
[ 1488.562222] [<ffffffffa0361423>] relocate_block_group+0x23f/0x503
[btrfs]
[ 1488.562340] [<ffffffffa0361834>]
btrfs_relocate_block_group+0x14d/0x281 [btrfs]
[ 1488.562514] [<ffffffffa0341124>]
btrfs_relocate_chunk.isra.66+0x58/0x60e [btrfs]
[ 1488.562686] [<ffffffffa034e39c>] ?
btrfs_set_lock_blocking_rw+0x89/0xb5 [btrfs]
[ 1488.562853] [<ffffffffa0303ee9>] ? btrfs_set_path_blocking+0x23/0x54
[btrfs]
[ 1488.562968] [<ffffffffa030871a>] ? btrfs_search_slot+0x718/0x772
[btrfs]
[ 1488.563088] [<ffffffffa033d432>] ? free_extent_buffer+0x77/0x7c
[btrfs]
[ 1488.563208] [<ffffffffa034383b>] btrfs_shrink_device+0x23c/0x3a5
[btrfs]
[ 1488.563327] [<ffffffffa034688c>] btrfs_rm_device+0x292/0x68f [btrfs]
[ 1488.563445] [<ffffffffa034cceb>] btrfs_ioctl+0x918/0x18f9 [btrfs]
[ 1488.563554] [<ffffffff81164636>] ? avc_has_perm_flags+0x32/0xf7
[ 1488.563663] [<ffffffff8102e937>] ? __do_page_fault+0x34f/0x3f3
[ 1488.563772] [<ffffffff810fd6fd>] vfs_ioctl+0x21/0x34
[ 1488.563877] [<ffffffff810fdf4f>] do_vfs_ioctl+0x3b1/0x3f4
[ 1488.563984] [<ffffffff810fdfe4>] SyS_ioctl+0x52/0x82
[ 1488.564091] [<ffffffff8137dad2>] system_call_fastpath+0x16/0x1b
[ 1488.564195] Code: 60 71 fd 49 89 40 50 49 89 40 58 49 8b 40 58 4d 89
68 58 49 83 c0 50 4d 89 45 00 49 89 45 08 4c 89 28 e9 aa 00 00 00 a8 10
75 02 <0f> 0b 83 e0 01 41 39 c4 74 02 0f 0b 45 85 e4 75 32 49 8b 70 18
[ 1488.567049] RIP [<ffffffffa035f729>] build_backref_tree+0xb10/0xe91
[btrfs]
[ 1488.567207] RSP <ffff8807f9e23928>
[ 1488.567325] ---[ end trace 1c4992d3332e9f0f ]---
--
Tomasz Chmielewski
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