Re: Kernel error during btrfs balance

[Erik Logtenberg <erik@logtenberg.eu>]

[-- Attachment #1: Type: text/plain, Size: 1210 bytes --]

Hi,

Please find attached the error log, for future reference.

Forgot to mention:
I could still use the system after this error, so it was not a complete
fatal error in that regard. All active processes (mostly rsync) were
hanging in state D though, so I couldn't kill them anymore. Also the FS
was not umountable. So I still had to reboot.

Thanks,

Erik.


On 01/17/2011 03:14 PM, Erik Logtenberg wrote:
> Hi,
> 
> btrfs balance results in:
> 
> http://pastebin.com/v5j0809M
> 
> My system: fully up-to-date Fedora 14 with rawhide kernel to make btrfs
> balance do useful stuff to my free space:
> 
> kernel-2.6.37-2.fc15.x86_64
> btrfs-progs-0.19-12.fc14.x86_64
> 
> Filesystem had 0 bytes free, should be 45G, so on darklings advice I ran
> btrfs balance on the fs, while doing heavy I/O (re-running 5 backup jobs
> that had failed due to ENOSP).
> Up until the crash, btrfs balance did retrieve a couple of Gigs free
> space though, so that part of the plan worked just fine.
> 
> Thanks,
> 
> Erik.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html


[-- Attachment #2: 2011-01-17_btrfs_balance.txt --]
[-- Type: text/plain, Size: 4386 bytes --]

[ 5225.236087] ------------[ cut here ]------------
[ 5225.236112] kernel BUG at fs/btrfs/relocation.c:836!
[ 5225.236131] invalid opcode: 0000 [#1] SMP 
[ 5225.236151] last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
[ 5225.236178] CPU 0 
[ 5225.236186] Modules linked in: ipt_LOG xt_limit btrfs zlib_deflate libcrc32c sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt tun ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs nls_utf8 cifs fscache sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 kvm_intel kvm dummy uinput snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm shpchp snd_timer dell_wmi snd soundcore sparse_keymap snd_page_alloc dcdbas i2c_i801 e1000e iTCO_wdt iTCO_vendor_support joydev wmi serio_raw microcode usb_storage uas raid1 pata_acpi ata_generic radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
[ 5225.236582] 
[ 5225.236591] Pid: 2934, comm: btrfs Tainted: G          I 2.6.37-2.fc15.x86_64 #1                  
[ 5225.236627] RIP: 0010:[<ffffffffa0565237>]  [<ffffffffa0565237>] build_backref_tree+0x473/0xd6d [btrfs]
[ 5225.236676] RSP: 0018:ffff8801972af9c8  EFLAGS: 00010246
[ 5225.236695] RAX: ffff8800aa9ab880 RBX: ffff8800ac38e300 RCX: 0000000000000040
[ 5225.236720] RDX: 0000000000000030 RSI: 000000254e680000 RDI: ffff88019cfc3020
[ 5225.236745] RBP: ffff8801972afaf8 R08: 0000000000008050 R09: ffff8801972af970
[ 5225.236770] R10: ffff8801972af918 R11: ffff8801972af900 R12: ffff8800aa9ab880
[ 5225.236794] R13: ffff88018b186340 R14: ffff88021fa3bea0 R15: ffff88021fa3bb40
[ 5225.236820] FS:  00007f98476bd760(0000) GS:ffff8800bfa00000(0000) knlGS:0000000000000000
[ 5225.236848] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 5225.236869] CR2: 0000000000a0eb44 CR3: 00000001972ab000 CR4: 00000000000426e0
[ 5225.236894] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5225.236918] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 5225.236943] Process btrfs (pid: 2934, threadinfo ffff8801972ae000, task ffff88019ce7c560)
[ 5225.236971] Stack:
[ 5225.236980]  ffffea0005056ee0 ffffea0000000000 ffff8801972af9f8 ffff8801972afaa8
[ 5225.237002]  0000000000000000 ffff88007b1eae58 ffff88019cfc3008 ffff88019cfc3578
[ 5225.237002]  ffff8801bd12ffe0 ffff88019cfc3020 ffff8800ac38e340 ffff88019cfc3580
[ 5225.237002] Call Trace:
[ 5225.237002]  [<ffffffffa0565c91>] relocate_tree_blocks+0x160/0x478 [btrfs]
[ 5225.237002]  [<ffffffffa056463d>] ? add_tree_block+0x11e/0x13e [btrfs]
[ 5225.237002]  [<ffffffffa0566b45>] relocate_block_group+0x1e3/0x490 [btrfs]
[ 5225.237002]  [<ffffffff8103edb9>] ? should_resched+0xe/0x2e
[ 5225.237002]  [<ffffffffa0566f39>] btrfs_relocate_block_group+0x147/0x28a [btrfs]
[ 5225.237002]  [<ffffffffa054e52a>] btrfs_relocate_chunk.clone.40+0x61/0x4ab [btrfs]
[ 5225.237002]  [<ffffffffa05152d4>] ? btrfs_item_key+0x1e/0x20 [btrfs]
[ 5225.237002]  [<ffffffffa05152f0>] ? btrfs_item_key_to_cpu+0x1a/0x36 [btrfs]
[ 5225.237002]  [<ffffffffa054c2a8>] ? read_extent_buffer+0xc3/0xe3 [btrfs]
[ 5225.237002]  [<ffffffffa05154e6>] ? btrfs_header_nritems.clone.12+0x17/0x1c [btrfs]
[ 5225.237002]  [<ffffffffa054cff6>] ? btrfs_item_key_to_cpu+0x2a/0x46 [btrfs]
[ 5225.237002]  [<ffffffffa055045e>] btrfs_balance+0x1a3/0x1f0 [btrfs]
[ 5225.237002]  [<ffffffff8112bce5>] ? do_filp_open+0x226/0x5c8
[ 5225.237002]  [<ffffffffa0556773>] btrfs_ioctl+0x641/0x846 [btrfs]
[ 5225.237002]  [<ffffffff811f3ed1>] ? file_has_perm+0xa5/0xc7
[ 5225.237002]  [<ffffffff8112e091>] do_vfs_ioctl+0x4b1/0x4f2
[ 5225.237002]  [<ffffffff8112e128>] sys_ioctl+0x56/0x7a
[ 5225.237002]  [<ffffffff8100acc2>] system_call_fastpath+0x16/0x1b
[ 5225.237002] Code: 48 8b 45 89 49 8d 7d 10 48 8d 75 b0 49 89 44 24 18 8a 43 70 ff c0 41 88 44 24 70 e8 f7 c3 ff ff eb 17 f6 40 71 10 49 89 c4 75 02 <0f> 0b 49 8d 45 10 49 89 45 10 49 89 45 18 48 8b b5 20 ff ff ff 
[ 5225.237002] RIP  [<ffffffffa0565237>] build_backref_tree+0x473/0xd6d [btrfs]
[ 5225.237002]  RSP <ffff8801972af9c8>
[ 5225.247188] ---[ end trace a7919e7f17c0a727 ]---