Re: Kernel BUG: btrfs send - Incremental backup

quwenruo
2014-03-10T02:16:02Z

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On Sat, 8 Mar 2014 08:35:17 +0100, SwÃ¢mi Petaramesh wrote:
> Hi there,
>
> I tried to perform an incremental backup as described in
> https://btrfs.wiki.kernel.org/index.php/Incremental_Backup between 2 external
> USB drives,
>
> The 1st "btrfs send foo/snap1 | btrfs receive bar" went well, although it took
> 5-6 times the time the same workload takes in ZFS.
>
> Then "btrfs send -v -p foo/snap1 foo/snap2 | btrfs receive bar" crashed on me.
>
> After a reboot and retry, I get a KERNEL BUG again :
>
>
> # uname -a
> Linux tethys 3.13.5-1-ARCH #1 SMP PREEMPT Sun Feb 23 00:25:24 CET 2014 x86_64
> GNU/Linux
>
> btrfs send -v -p foo/snap1 foo/snap2 | btrfs receive bar
>
>
> mars 08 08:22:01 tethys kernel: ------------[ cut here ]------------
> mars 08 08:22:01 tethys kernel: kernel BUG at fs/btrfs/send.c:4398!
> mars 08 08:22:02 tethys kernel: invalid opcode: 0000 [#1] PREEMPT SMP
> mars 08 08:22:02 tethys kernel: Modules linked in: usb_storage md5 fuse ecb
> ecryptfs encrypted_keys hmac trusted tpm ctr ccm intel_rapl
> x86_pkg_temp_thermal rts5139(C)
> mars 08 08:22:02 tethys kernel: usbhid hid sr_mod cdrom sd_mod atkbd libps2
> crct10dif_pclmul crct10dif_common crc32_pclmul ahci crc32c_intel
> ghash_clmulni_intel libahc
> mars 08 08:22:02 tethys kernel: CPU: 0 PID: 2432 Comm: btrfs Tainted: P
> C O 3.13.5-1-ARCH #1
> mars 08 08:22:02 tethys kernel: Hardware name: TOSHIBA SATELLITE L735/Base
> Board Product Name, BIOS 2.50 06/26/2012
> mars 08 08:22:02 tethys kernel: task: ffff880041724800 ti: ffff88003b84a000
> task.ti: ffff88003b84a000
> mars 08 08:22:02 tethys kernel: RIP: 0010:[<ffffffffa0363ba5>] [<ffffffffa0363ba5>]
> changed_cb+0x9e5/0x9f0 [btrfs]
> mars 08 08:22:02 tethys kernel: RSP: 0018:ffff88003b84bb48 EFLAGS: 00010283
> mars 08 08:22:02 tethys kernel: RAX: 00000000000579d5 RBX: ffff88013279ea00 RCX:
> 0000000000000060
> mars 08 08:22:02 tethys kernel: RDX: ffff88003b84bc65 RSI: 00000000000579cd RDI:
> ffff88013279ea00
> mars 08 08:22:02 tethys kernel: RBP: ffff88003b84bbe0 R08: ffff88003b84bc65 R09:
> 0000000000000002
> mars 08 08:22:02 tethys kernel: R10: ffff88005981a900 R11: 0000000000000000 R12:
> 0000000000000002
> mars 08 08:22:02 tethys kernel: R13: ffff88003b84bc65 R14: ffff88007c628800 R15:
> 0000000000002ad1
> mars 08 08:22:02 tethys kernel: FS: 00007fceade62880(0000)
> GS:ffff88014f400000(0000) knlGS:0000000000000000
> mars 08 08:22:02 tethys kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> mars 08 08:22:02 tethys kernel: CR2: 00007fb4cc8c8000 CR3: 0000000041a99000
> CR4: 00000000000407f0
> mars 08 08:22:02 tethys kernel: Stack:
> mars 08 08:22:02 tethys kernel: ffff88003b84bb88 ffffffffa03206ec 00000000000008ca
> ffff88005981a900
> mars 08 08:22:02 tethys kernel: 0000000000000000 ffff88005981a900
> ffff88005981a870 0000000000000000
> mars 08 08:22:02 tethys kernel: ffff88003b84bbe0 ffffffffa03161e9 ffff88003b84bc76
> ffff88003b84bbe0
> mars 08 08:22:02 tethys kernel: Call Trace:
> mars 08 08:22:02 tethys kernel: [<ffffffffa03206ec>] ?
> read_extent_buffer+0xbc/0x110 [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa03161e9>] ?
> btrfs_get_token_32+0x59/0xe0 [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa0320e81>] ?
> memcmp_extent_buffer+0xc1/0x120 [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa02e1b10>]
> btrfs_compare_trees+0x790/0x970 [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa03631c0>] ?
> finish_inode_if_needed+0x4e0/0x4e0 [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa0364568>] btrfs_ioctl_send+0x8a8/0xc80
> [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffffa0332afe>] btrfs_ioctl+0xfee/0x27a0
> [btrfs]
> mars 08 08:22:02 tethys kernel: [<ffffffff81096bc8>] ? __enqueue_entity+0x78/0x80
> mars 08 08:22:02 tethys kernel: [<ffffffff8109c6cb>] ? enqueue_entity+0x29b/0xa10
> mars 08 08:22:02 tethys kernel: [<ffffffff8109cf47>] ?
> enqueue_task_fair+0x107/0x540
> mars 08 08:22:02 tethys kernel: [<ffffffff8108f45a>] ? enqueue_task+0x3a/0x60
> mars 08 08:22:02 tethys kernel: [<ffffffff810902c5>] ?
> check_preempt_curr+0x75/0xa0
> mars 08 08:22:02 tethys kernel: [<ffffffff811b5fe0>] do_vfs_ioctl+0x2e0/0x4c0
> mars 08 08:22:02 tethys kernel: [<ffffffff81060d0f>] ? do_fork+0x12f/0x320
> mars 08 08:22:02 tethys kernel: [<ffffffff811b6241>] SyS_ioctl+0x81/0xa0
> mars 08 08:22:02 tethys kernel: [<ffffffff8152142d>]
> system_call_fastpath+0x1a/0x1f
> mars 08 08:22:02 tethys kernel: Code: 48 8d 75 b6 45 31 c0 b9 01 00 00 00 4c
> 89 e2 4c 89 f7 e8 2f eb f7 ff 85 c0 0f 89 77 ff ff ff e9 a0 fd ff ff 31 c0 e9 99 fd
> ff ff <
> mars 08 08:22:02 tethys kernel: RIP [<ffffffffa0363ba5>] changed_cb+0x9e5/0x9f0
> [btrfs]
> mars 08 08:22:02 tethys kernel: RSP <ffff88003b84bb48>
> mars 08 08:22:02 tethys kernel: ---[ end trace 718b3fc11b4d9241 ]---
>
>
> HTH, TIA.
>
Hi,

Does the filesystem pass the btrfsck?
If not, would you please try btrfsck first?

Thanks.
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