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Re: XFS filesystem shutting down on linux 2.6.28.9 (xfs_rename)

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: XFS filesystem shutting down on linux 2.6.28.9 (xfs_rename)
From: Gabriel Barazer <gabriel@xxxxxxxx>
Date: Mon, 27 Jul 2009 13:40:17 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <4A67E2F5.2030400@xxxxxxxxxxx>
Organization: Oxeva
References: <000c01ca0ae0$e85420a0$b8fc61e0$@fr> <4A67E2F5.2030400@xxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.22 (Windows/20090605)
Eric Sandeen wrote:
Gabriel Barazer wrote:
Hi,

I recently put a NFS file server into production, with mostly XFS volumes on 
LVM. The server was quite low on traffic until this morning and one of the 
filesystems crashed twice since this morning with the following backtrace:

Filesystem "dm-24": XFS internal error xfs_trans_cancel at line 1164 of file 
fs/xfs/xfs_trans.c.  Caller 0xffffffff811b09a7
Pid: 2053, comm: nfsd Not tainted 2.6.28.9-filer #1
Call Trace:
 [<ffffffff811b09a7>] xfs_rename+0x4a1/0x4f6
 [<ffffffff811b1806>] xfs_trans_cancel+0x56/0xed
 [<ffffffff811b09a7>] xfs_rename+0x4a1/0x4f6
...

xfs_force_shutdown(dm-24,0x8) called from line 1165 of file fs/xfs/xfs_trans.c. 
 Return address = 0xffffffff811b181f
Filesystem "dm-24": Corruption of in-memory data detected.  Shutting down 
filesystem: dm-24

The two crashed are related to the same function: xfs_rename.

Can you do objdump -d xfs.ko | grep "xfs_rename\|xfs_trans_cancel" and
maybe we can see which call to xfs_trans_cancel in xfs_rename this was.

The problem relates to canceling a dirty transaction on an error path.
Hi,

sorry for the late reply

I don't have any xfs.ko as my kernel is compiled without CONFIG_MODULES. However I objdump'd the vmlinux uncompressed kernel, and here are the results:

ffffffff8116dcb8: e8 f3 3a 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8116f61b: e8 90 21 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8116f68f: e8 1c 21 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8116fbaa: e8 01 1c 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8116fbee: e8 bd 1b 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117073c: e8 6f 10 04 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117261b: e8 90 f1 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff81174dde: e8 cd c9 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff81175303: e8 a8 c4 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117c08a: e8 21 57 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117c146: e8 65 56 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117cf06: e8 a5 48 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117d000: e8 ab 47 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117dd83: e8 28 3a 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8117dfa3: e8 08 38 03 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811845fa: e8 b1 d1 02 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff81184929: e8 82 ce 02 00 callq ffffffff811b17b0 <xfs_trans_cancel>

ffffffff81199b89: e9 22 7c 01 00 jmpq ffffffff811b17b0 <xfs_trans_cancel> ffffffff8119aa30: e8 7b 6d 01 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a46d1: e8 da d0 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a4813: e8 98 cf 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a4929: e8 82 ce 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a4b8a: e8 21 cc 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a4e8b: e8 20 c9 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a509e: e8 0d c7 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a6bf7: e8 b4 ab 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811a6c86: e8 25 ab 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811aa18a: e8 21 76 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811abe18: e8 93 59 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811aeb5c: e8 4f 2c 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811aecf9: e8 b2 2a 00 00 callq ffffffff811b17b0 <xfs_trans_cancel>
ffffffff811b04ca <xfs_rename_unlock4>:
ffffffff811b04e6: 74 19 je ffffffff811b0501 <xfs_rename_unlock4+0x37> ffffffff811b04ed: 74 08 je ffffffff811b04f7 <xfs_rename_unlock4+0x2d> ffffffff811b04ff: 75 dd jne ffffffff811b04de <xfs_rename_unlock4+0x14>
ffffffff811b0506 <xfs_rename>:
ffffffff811b0563: 74 21 je ffffffff811b0586 <xfs_rename+0x80> ffffffff811b0568: 75 1c jne ffffffff811b0586 <xfs_rename+0x80> ffffffff811b056f: 74 15 je ffffffff811b0586 <xfs_rename+0x80> ffffffff811b0580: 0f 87 38 04 00 00 ja ffffffff811b09be <xfs_rename+0x4b8> ffffffff811b0628: 75 23 jne ffffffff811b064d <xfs_rename+0x147> ffffffff811b064f: 74 04 je ffffffff811b0655 <xfs_rename+0x14f> ffffffff811b0653: eb 18 jmp ffffffff811b066d <xfs_rename+0x167> ffffffff811b0666: 74 13 je ffffffff811b067b <xfs_rename+0x175> ffffffff811b0676: e9 27 03 00 00 jmpq ffffffff811b09a2 <xfs_rename+0x49c> ffffffff811b0695: 74 39 je ffffffff811b06d0 <xfs_rename+0x1ca> ffffffff811b06a6: 74 28 je ffffffff811b06d0 <xfs_rename+0x1ca> ffffffff811b06b2: e8 13 fe ff ff callq ffffffff811b04ca <xfs_rename_unlock4> ffffffff811b06c1: e8 ea 10 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b06cb: e9 ee 02 00 00 jmpq ffffffff811b09be <xfs_rename+0x4b8> ffffffff811b06ef: 74 1a je ffffffff811b070b <xfs_rename+0x205> ffffffff811b0729: 74 37 je ffffffff811b0762 <xfs_rename+0x25c> ffffffff811b0757: 0f 85 ab 00 00 00 jne ffffffff811b0808 <xfs_rename+0x302> ffffffff811b075d: e9 88 00 00 00 jmpq ffffffff811b07ea <xfs_rename+0x2e4> ffffffff811b0779: 0f 85 51 02 00 00 jne ffffffff811b09d0 <xfs_rename+0x4ca> ffffffff811b07a7: 0f 84 23 02 00 00 je ffffffff811b09d0 <xfs_rename+0x4ca> ffffffff811b07af: 0f 85 2e 02 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b07c7: 0f 84 a6 00 00 00 je ffffffff811b0873 <xfs_rename+0x36d> ffffffff811b07d2: 0f 84 9b 00 00 00 je ffffffff811b0873 <xfs_rename+0x36d> ffffffff811b07e5: e9 81 00 00 00 jmpq ffffffff811b086b <xfs_rename+0x365> ffffffff811b07f4: 0f 84 dd 01 00 00 je ffffffff811b09d7 <xfs_rename+0x4d1> ffffffff811b0802: 0f 87 cf 01 00 00 ja ffffffff811b09d7 <xfs_rename+0x4d1> ffffffff811b082f: 0f 85 ae 01 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b0851: 0f 85 8c 01 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b085c: 74 15 je ffffffff811b0873 <xfs_rename+0x36d> ffffffff811b086d: 0f 85 70 01 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b087d: 74 35 je ffffffff811b08b4 <xfs_rename+0x3ae> ffffffff811b0884: 74 2e je ffffffff811b08b4 <xfs_rename+0x3ae> ffffffff811b08ae: 0f 85 2f 01 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b08c6: 74 21 je ffffffff811b08e9 <xfs_rename+0x3e3> ffffffff811b08cb: 75 07 jne ffffffff811b08d4 <xfs_rename+0x3ce> ffffffff811b08d2: 74 15 je ffffffff811b08e9 <xfs_rename+0x3e3> ffffffff811b08e3: 0f 85 fa 00 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b0910: 0f 85 cd 00 00 00 jne ffffffff811b09e3 <xfs_rename+0x4dd> ffffffff811b0941: 74 18 je ffffffff811b095b <xfs_rename+0x455> ffffffff811b0966: 74 09 je ffffffff811b0971 <xfs_rename+0x46b> ffffffff811b098a: 74 21 je ffffffff811b09ad <xfs_rename+0x4a7> ffffffff811b09a2: e8 09 0e 00 00 callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b09ab: eb 11 jmp ffffffff811b09be <xfs_rename+0x4b8> ffffffff811b09d5: eb 11 jmp ffffffff811b09e8 <xfs_rename+0x4e2> ffffffff811b09e1: eb 05 jmp ffffffff811b09e8 <xfs_rename+0x4e2> ffffffff811b09f8: eb a3 jmp ffffffff811b099d <xfs_rename+0x497>
ffffffff811b17b0 <xfs_trans_cancel>:
ffffffff811b17c1: 74 0c je ffffffff811b17cf <xfs_trans_cancel+0x1f> ffffffff811b17d3: 74 4a je ffffffff811b181f <xfs_trans_cancel+0x6f> ffffffff811b17de: 75 3f jne ffffffff811b181f <xfs_trans_cancel+0x6f> ffffffff811b1839: 74 06 je ffffffff811b1841 <xfs_trans_cancel+0x91> ffffffff811b1848: 74 12 je ffffffff811b185c <xfs_trans_cancel+0xac> ffffffff811b3bb7: e8 f4 db ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b3c32: e8 79 db ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b4753: e8 58 d0 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b53e9: e8 c2 c3 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b5497: e8 14 c3 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b5baa: e8 01 bc ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b5f40: e8 6b b8 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6000: e8 ab b7 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6458: e8 53 b3 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6730: e8 7b b0 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6a58: e8 53 ad ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6c5c: e8 4f ab ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6c95: e8 16 ab ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6cf7: e8 b4 aa ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b6d83: e8 28 aa ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b706b: e8 40 a7 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b715b: e8 50 a6 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b7305: e8 a6 a4 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b7372: e8 39 a4 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b7407: e8 a4 a3 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b74e5: e8 c6 a2 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b77a9: e8 02 a0 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b7f94: e8 17 98 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b83e8: e8 c3 93 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b866b: e8 40 91 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b8838: e8 73 8f ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b8bb0: e8 fb 8b ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b8d2c: e8 7f 8a ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b8f17: e8 94 88 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b9463: e8 48 83 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b950f: e8 9c 82 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811b9677: e8 34 81 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811be2af: e8 fc 34 ff ff callq ffffffff811b17b0 <xfs_trans_cancel> ffffffff811bfacc: e8 35 0a ff ff callq ffffffff811b0506 <xfs_rename>


Gabriel

-Eric

I _really_ cannot upgrade to 2.6.29 or later because of the "reconnect_path: npd != 
pd" bug and the maybe related radix-tree bug ( 
http://bugzilla.kernel.org/show_bug.cgi?id=13375 ) affecting all kernel version afeter 
2.6.28.

Unmounting then remounting the filesystem allow to access the mountpoint again 
without any error message or apparent file corruption.
This filesystem is used by ~30 NFS clients and contains about 5M files (100GB).

Before using the volume over NFS, there was only local activity (rsync syncing) 
and we didn't get any error.

I expect to see this crash again in a few hours except if the volume is really 
corrupted. Does a full filesystem copy to a newly created volume would have a 
chance to solve the problem?

Thanks,

Gabriel


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