He Guys!
I think i found a bug in:
uname -a
Linux NAS 4.6.0-rc3-amd64 #1 SMP Debian 4.6~rc3-1~exp1 (2016-04-14)
x86_64 GNU/Linux
The fliesystem has some corrupt sectors caused by an faulty drive.
While adding a new drive, removing the damaged failed, I had some
success with the replace command.
Balancing fails now.
The kernel message is as follows:
[ 747.642497] BTRFS info (device sdb2): disk space caching is enabled
[ 747.648272] BTRFS info (device sdb2): bdev /dev/sdc1 errs: wr 2, rd
0, flush 0, corrupt 633433, gen 0
[ 747.673858] BTRFS info (device sdb2): continuing balance
[ 748.380758] BTRFS info (device sdb2): relocating block group
61336453120 flags 1
[ 748.412392] BTRFS warning (device sdb2): csum failed ino 257 off
895795200 csum 2566472073 expected csum 2554651624
[ 748.412899] BTRFS warning (device sdb2): csum failed ino 257 off
895795200 csum 2566472073 expected csum 2554651624
[ 748.430037] ------------[ cut here ]------------
[ 748.430131] kernel BUG at
/build/linux-aGlcVo/linux-4.6~rc3/fs/btrfs/volumes.c:3421!
[ 748.430256] invalid opcode: 0000 [#1] SMP
[ 748.430334] Modules linked in: nfsd(E) auth_rpcgss(E) nfs_acl(E)
nfs(E) lockd(E) grace(E) fscache(E) sunrpc(E) zram(E) zsmalloc(E)
lz4_compress(E) i915(E) video(E) ppdev(E) iTCO_wdt(E)
iTCO_vendor_support(E) drm_kms_helper(E) evdev(E) serio_raw(E) pcspkr(E)
coretemp(E) i2c_i801(E) drm(E) acpi_cpufreq(E) tpm_tis(E)
i2c_algo_bit(E) tpm(E) sg(E) parport_pc(E) lpc_ich(E) mfd_core(E)
parport(E) shpchp(E) 8250_fintek(E) button(E) processor(E) ext4(E)
crc16(E) jbd2(E) mbcache(E) btrfs(E) crc32c_generic(E) xor(E)
raid6_pq(E) hid_generic(E) usbhid(E) hid(E) uas(E) usb_storage(E)
sd_mod(E) ata_generic(E) ehci_pci(E) ahci(E) pata_jmicron(E) libahci(E)
uhci_hcd(E) ehci_hcd(E) usbcore(E) libata(E) usb_common(E) scsi_mod(E)
r8169(E) mii(E) fjes(E)
[ 748.431644] CPU: 3 PID: 2325 Comm: btrfs-balance Tainted:
G E 4.6.0-rc3-amd64 #1 Debian 4.6~rc3-1~exp1
[ 748.431807] Hardware name: Gigabyte Technology Co., Ltd.
D525TUD/D525TUD, BIOS F5 06/20/2011
[ 748.431942] task: ffff88013abdc080 ti: ffff8800ba5c0000 task.ti:
ffff8800ba5c0000
[ 748.432060] RIP: 0010:[<ffffffffc02bbfc8>] [<ffffffffc02bbfc8>]
btrfs_balance+0x1038/0x11c0 [btrfs]
[ 748.432262] RSP: 0018:ffff8800ba5c3d98 EFLAGS: 00010282
[ 748.432348] RAX: 00000000fffffffb RBX: cccccccccccccccd RCX:
0000000000000000
[ 748.432462] RDX: 0000000000000001 RSI: 0000000000100000 RDI:
ffff8801391d4740
[ 748.432575] RBP: ffff880036830670 R08: 0000000000000000 R09:
ffff8800ba1f26c0
[ 748.432688] R10: 0000000000000000 R11: ffffffff81b05740 R12:
ffff880139bab000
[ 748.432801] R13: 0000000000000000 R14: 000000007f700000 R15:
ffff8801391d4000
[ 748.432915] FS: 0000000000000000(0000) GS:ffff88013fd80000(0000)
knlGS:0000000000000000
[ 748.433043] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 748.433043] CR2: 0000000001f8c808 CR3: 00000000ba8c2000 CR4:
00000000000006e0
[ 748.433043] Stack:
[ 748.433043] ffff8800bb0a5000 ffff880036341600 0000000000000000
ffff8800b8b20000
[ 748.433043] ffff88013ab46508 ffff8800baf38d68 ffffffff8116f85f
ffff880036341600
[ 748.433043] ffff8800ba5c3e38 ffff8800ba5c3df0 0000000070f7f732
0000000000000721
[ 748.433043] Call Trace:
[ 748.433043] [<ffffffff8116f85f>] ? printk+0x57/0x73
[ 748.433043] [<ffffffffc025fe7d>] ? btrfs_printk+0x8d/0xf0 [btrfs]
[ 748.433043] [<ffffffffc02bc1a6>] ? balance_kthread+0x56/0x80 [btrfs]
[ 748.433043] [<ffffffffc02bc150>] ? btrfs_balance+0x11c0/0x11c0 [btrfs]
[ 748.433043] [<ffffffff81098e1d>] ? kthread+0xcd/0xf0
[ 748.433043] [<ffffffff815c46b2>] ? ret_from_fork+0x22/0x40
[ 748.433043] [<ffffffff81098d50>] ? kthread_create_on_node+0x190/0x190
[ 748.433043] Code: 24 70 e8 ec 90 fa ff 8b 44 24 68 85 c0 0f 84 21 fa
ff ff 8b 54 24 68 48 c7 c6 c0 8e 31 c0 4c 89 ff e8 2d 3e fa ff e9 09 fa
ff ff <0f> 0b 48 b8 18 00 00 00 00 00 01 00 e9 00 f1 ff ff 0f 0b 4c 89
[ 748.433043] RIP [<ffffffffc02bbfc8>] btrfs_balance+0x1038/0x11c0 [btrfs]
[ 748.433043] RSP <ffff8800ba5c3d98>
[ 748.451365] ---[ end trace 5b324cae3a38b34a ]---
The filesystem it OOOOPS:
btrfs fi show /mnt/
Label: none uuid: 456808c9-5049-44a0-b1d3-17565df6fe11
Total devices 2 FS bytes used 45.00GiB
devid 1 size 50.12GiB used 49.31GiB path /dev/sdb2
devid 2 size 1.99GiB used 1.99GiB path /dev/sdc1
btrfs fi df /mnt/
Data, single: total=48.51GiB, used=43.83GiB
System, single: total=32.00MiB, used=16.00KiB
Metadata, single: total=2.76GiB, used=1.17GiB
GlobalReserve, single: total=400.00MiB, used=0.00B
Maybe this problem is still valid.
regards
sash
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