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Date: Thu, 29 Jul 2010 22:20:12 +0400
From: Vladislav Bolkhovitin <vst@...b.net>
To: Jan Kara <jack@...e.cz>
CC: Christoph Hellwig <hch@....de>, Ted Ts'o <tytso@....edu>,
Tejun Heo <tj@...nel.org>, Vivek Goyal <vgoyal@...hat.com>,
jaxboe@...ionio.com, James.Bottomley@...e.de,
linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
chris.mason@...cle.com, swhiteho@...hat.com,
konishi.ryusuke@....ntt.co.jp, linux-kernel@...r.kernel.org
Subject: Re: extfs reliability
Jan Kara, on 07/29/2010 06:26 PM wrote:
>> root@ini:/mnt/dbench-mod# ^C
>> root@ini:/mnt/dbench-mod# ^C
>> root@ini:~# umount /mnt
>> Segmentation fault
> This isn't OK of course ;)
>
>> Kernel log:
>>
>> Jul 29 19:55:35 ini kernel: [ 3044.722313] c2c28e40: 00023740 00023741 00023742 00023743 @7..A7..B7..C7..
>> Jul 29 19:55:35 ini kernel: [ 3044.722320] c2c28e50: 00023744 00023745 00023746 00023747 D7..E7..F7..G7..
>> Jul 29 19:55:35 ini kernel: [ 3044.722327] c2c28e60: 00023748 00023749 0002374a 0002374b H7..I7..J7..K7..
>> Jul 29 19:55:35 ini kernel: [ 3044.722334] c2c28e70: 0002372c 00000000 00000000 00000000 ,7..............
>> Jul 29 19:55:35 ini kernel: [ 3044.722341] c2c28e80: 00000000 00000000 00000000 00000002 ................
> ...
> Sadly these messages above seem to have overwritten beginning of the
> message below. Hmm, but maybe it's just a warning message about inode still
> being on orphan list because the next oops still shows untainted kernel.
You can find previous messages in the attachments I attached to the report. They are big (500K and 1M), so I compressed and attached them.
>> Jul 29 19:55:35 ini kernel: [ 3044.722546] Pid: 1299, comm: umount Not tainted 2.6.32-22-386 #36-Ubuntu
>> Jul 29 19:55:35 ini kernel: [ 3044.722550] Call Trace:
>> Jul 29 19:55:35 ini kernel: [ 3044.722567] [<c0291731>] ext4_destroy_inode+0x91/0xa0
>> Jul 29 19:55:35 ini kernel: [ 3044.722577] [<c020ecb4>] destroy_inode+0x24/0x40
>> Jul 29 19:55:35 ini kernel: [ 3044.722583] [<c020f11e>] dispose_list+0x8e/0x100
>> Jul 29 19:55:35 ini kernel: [ 3044.722588] [<c020f534>] invalidate_inodes+0xf4/0x120
>> Jul 29 19:55:35 ini kernel: [ 3044.722598] [<c023b310>] ? vfs_quota_off+0x0/0x20
>> Jul 29 19:55:35 ini kernel: [ 3044.722606] [<c01fc602>] generic_shutdown_super+0x42/0xe0
>> Jul 29 19:55:35 ini kernel: [ 3044.722612] [<c01fc6ca>] kill_block_super+0x2a/0x50
>> Jul 29 19:55:35 ini kernel: [ 3044.722618] [<c01fd4e4>] deactivate_super+0x64/0x90
>> Jul 29 19:55:35 ini kernel: [ 3044.722625] [<c021282f>] mntput_no_expire+0x8f/0xe0
>> Jul 29 19:55:35 ini kernel: [ 3044.722631] [<c0212e47>] sys_umount+0x47/0xa0
>> Jul 29 19:55:35 ini kernel: [ 3044.722636] [<c0212ebe>] sys_oldumount+0x1e/0x20
>> Jul 29 19:55:35 ini kernel: [ 3044.722643] [<c01033ec>] syscall_call+0x7/0xb
>> Jul 29 19:55:35 ini kernel: [ 3044.731043] sd 6:0:0:0: [sdb] Unhandled error code
>> Jul 29 19:55:35 ini kernel: [ 3044.731049] sd 6:0:0:0: [sdb] Result: hostbyte=DID_TRANSPORT_FAILFAST driverbyte=DRIVER_OK
>> Jul 29 19:55:35 ini kernel: [ 3044.731056] sd 6:0:0:0: [sdb] CDB: Write(10): 2a 00 00 00 00 00 00 00 01 00
>> Jul 29 19:55:35 ini kernel: [ 3044.743469] __ratelimit: 37 callbacks suppressed
>> Jul 29 19:55:35 ini kernel: [ 3044.755695] lost page write due to I/O error on sdb
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] Modules linked in: crc32c ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi w83627hf hwmon_vid fbcon tileblit font bitblit softcursor ppdev adm1021 i2c_i801 vga16fb vgastate e7xxx_edac psmouse serio_raw parport_pc shpchp edac_core lp parport qla2xxx ohci1394 scsi_transport_fc r8169 sata_via ieee1394 mii scsi_tgt e1000 floppy
> So here probably starts the real oops.
It isn't yet an oops, it's dump_stack() from ext4_destroy_inode() together with hex dump:
static void ext4_destroy_inode(struct inode *inode)
{
if (!list_empty(&(EXT4_I(inode)->i_orphan))) {
ext4_msg(inode->i_sb, KERN_ERR,
"Inode %lu (%p): orphan list check failed!",
inode->i_ino, EXT4_I(inode));
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
EXT4_I(inode), sizeof(struct ext4_inode_info),
true);
dump_stack();
}
kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
}
> But sadly we are missing the
> beginning as well.
It was also in the attached file.
> Can you send me disassembly of your ext4_put_super?
In System.map-2.6.32-22-386:
c0293940 t ext4_put_super
c0293c90 t ext4_quota_write
$ objdump -d --start-address=0xc0293940 vmlinux >ext4_put_super
^C
$ cat ext4_put_super
vmlinux: file format elf32-i386
Disassembly of section .text:
c0293940 <.text+0x193940>:
c0293940: 55 push %ebp
c0293941: 89 e5 mov %esp,%ebp
c0293943: 57 push %edi
c0293944: 56 push %esi
c0293945: 53 push %ebx
c0293946: 83 ec 28 sub $0x28,%esp
c0293949: e8 02 07 e7 ff call 0xc0104050
c029394e: 8b 98 84 01 00 00 mov 0x184(%eax),%ebx
c0293954: 89 c6 mov %eax,%esi
c0293956: 8b 83 2c 02 00 00 mov 0x22c(%ebx),%eax
c029395c: 8b 7b 38 mov 0x38(%ebx),%edi
c029395f: e8 ac b5 ec ff call 0xc015ef10
c0293964: 8b 83 2c 02 00 00 mov 0x22c(%ebx),%eax
c029396a: e8 41 af ec ff call 0xc015e8b0
c029396f: 89 f0 mov %esi,%eax
c0293971: e8 5a 86 f6 ff call 0xc01fbfd0
c0293976: e8 05 5a 2e 00 call 0xc0579380
c029397b: 80 7e 11 00 cmpb $0x0,0x11(%esi)
c029397f: 0f 85 0b 02 00 00 jne 0xc0293b90
c0293985: 8b 83 34 01 00 00 mov 0x134(%ebx),%eax
c029398b: 85 c0 test %eax,%eax
c029398d: 74 17 je 0xc02939a6
c029398f: e8 ec 64 02 00 call 0xc02b9e80
c0293994: c7 83 34 01 00 00 00 movl $0x0,0x134(%ebx)
c029399b: 00 00 00
c029399e: 85 c0 test %eax,%eax
c02939a0: 0f 88 ff 01 00 00 js 0xc0293ba5
c02939a6: 89 f0 mov %esi,%eax
c02939a8: e8 c3 22 01 00 call 0xc02a5c70
c02939ad: 89 f0 mov %esi,%eax
c02939af: e8 0c dc 00 00 call 0xc02a15c0
c02939b4: 89 f0 mov %esi,%eax
c02939b6: e8 c5 51 00 00 call 0xc0298b80
c02939bb: 89 f0 mov %esi,%eax
c02939bd: e8 de 45 01 00 call 0xc02a7fa0
c02939c2: f6 46 30 01 testb $0x1,0x30(%esi)
c02939c6: 0f 84 9c 01 00 00 je 0xc0293b68
c02939cc: 8b 93 f8 00 00 00 mov 0xf8(%ebx),%edx
c02939d2: 85 d2 test %edx,%edx
c02939d4: 74 11 je 0xc02939e7
c02939d6: 8b 15 c8 8a 8a c0 mov 0xc08a8ac8,%edx
c02939dc: 8d 86 64 01 00 00 lea 0x164(%esi),%eax
c02939e2: e8 59 fd fa ff call 0xc0243740
c02939e7: 8d bb fc 00 00 00 lea 0xfc(%ebx),%edi
c02939ed: 89 f8 mov %edi,%eax
c02939ef: e8 7c 5f 0a 00 call 0xc0339970
c02939f4: 8b 43 14 mov 0x14(%ebx),%eax
c02939f7: 85 c0 test %eax,%eax
c02939f9: 0f 84 c3 01 00 00 je 0xc0293bc2
c02939ff: 31 d2 xor %edx,%edx
c0293a01: 8b 4b 3c mov 0x3c(%ebx),%ecx
c0293a04: 31 c0 xor %eax,%eax
c0293a06: 89 75 f0 mov %esi,-0x10(%ebp)
c0293a09: 89 de mov %ebx,%esi
c0293a0b: 89 d3 mov %edx,%ebx
c0293a0d: 8d 76 00 lea 0x0(%esi),%esi
c0293a10: 8b 04 81 mov (%ecx,%eax,4),%eax
c0293a13: 85 c0 test %eax,%eax
c0293a15: 74 08 je 0xc0293a1f
c0293a17: e8 54 ab f8 ff call 0xc021e570
c0293a1c: 8b 4e 3c mov 0x3c(%esi),%ecx
c0293a1f: 83 c3 01 add $0x1,%ebx
c0293a22: 39 5e 14 cmp %ebx,0x14(%esi)
c0293a25: 89 d8 mov %ebx,%eax
c0293a27: 77 e7 ja 0xc0293a10
c0293a29: 89 f3 mov %esi,%ebx
c0293a2b: 8b 75 f0 mov -0x10(%ebp),%esi
c0293a2e: 89 c8 mov %ecx,%eax
c0293a30: e8 fb bb f5 ff call 0xc01ef630
c0293a35: 8b 15 2c 53 8a c0 mov 0xc08a532c,%edx
c0293a3b: 8b 83 28 02 00 00 mov 0x228(%ebx),%eax
c0293a41: 81 c2 00 00 80 00 add $0x800000,%edx
c0293a47: 39 d0 cmp %edx,%eax
c0293a49: 72 20 jb 0xc0293a6b
c0293a4b: 8b 15 c0 17 75 c0 mov 0xc07517c0,%edx
c0293a51: 81 ea 00 20 60 00 sub $0x602000,%edx
c0293a57: 81 e2 00 00 c0 ff and $0xffc00000,%edx
c0293a5d: 81 ea 00 20 00 00 sub $0x2000,%edx
c0293a63: 39 d0 cmp %edx,%eax
c0293a65: 0f 82 ed 00 00 00 jb 0xc0293b58
c0293a6b: e8 c0 bb f5 ff call 0xc01ef630
c0293a70: 8d 83 94 00 00 00 lea 0x94(%ebx),%eax
c0293a76: e8 c5 42 0b 00 call 0xc0347d40
c0293a7b: 8d 83 ac 00 00 00 lea 0xac(%ebx),%eax
c0293a81: e8 ba 42 0b 00 call 0xc0347d40
c0293a86: 8d 83 c4 00 00 00 lea 0xc4(%ebx),%eax
c0293a8c: e8 af 42 0b 00 call 0xc0347d40
c0293a91: 8d 83 dc 00 00 00 lea 0xdc(%ebx),%eax
c0293a97: e8 a4 42 0b 00 call 0xc0347d40
c0293a9c: 8b 43 34 mov 0x34(%ebx),%eax
c0293a9f: 85 c0 test %eax,%eax
c0293aa1: 74 05 je 0xc0293aa8
c0293aa3: e8 c8 aa f8 ff call 0xc021e570
c0293aa8: 8b 83 78 01 00 00 mov 0x178(%ebx),%eax
c0293aae: e8 7d bb f5 ff call 0xc01ef630
c0293ab3: 8b 83 7c 01 00 00 mov 0x17c(%ebx),%eax
c0293ab9: e8 72 bb f5 ff call 0xc01ef630
c0293abe: 8d 93 38 01 00 00 lea 0x138(%ebx),%edx
c0293ac4: 3b 93 38 01 00 00 cmp 0x138(%ebx),%edx
c0293aca: 0f 85 fa 00 00 00 jne 0xc0293bca
c0293ad0: 8b 86 94 00 00 00 mov 0x94(%esi),%eax
c0293ad6: e8 65 b4 f8 ff call 0xc021ef40
c0293adb: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax
c0293ae1: 85 c0 test %eax,%eax
c0293ae3: 74 31 je 0xc0293b16
c0293ae5: 3b 86 94 00 00 00 cmp 0x94(%esi),%eax
c0293aeb: 74 29 je 0xc0293b16
c0293aed: e8 4e 0f f9 ff call 0xc0224a40
c0293af2: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax
c0293af8: e8 43 b4 f8 ff call 0xc021ef40
c0293afd: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax
c0293b03: 85 c0 test %eax,%eax
c0293b05: 74 0f je 0xc0293b16
c0293b07: e8 64 d7 ff ff call 0xc0291270
c0293b0c: c7 83 74 01 00 00 00 movl $0x0,0x174(%ebx)
c0293b13: 00 00 00
c0293b16: c7 86 84 01 00 00 00 movl $0x0,0x184(%esi)
c0293b1d: 00 00 00
c0293b20: e8 2b 58 2e 00 call 0xc0579350
c0293b25: 89 f0 mov %esi,%eax
c0293b27: e8 c4 84 f6 ff call 0xc01fbff0
c0293b2c: 89 f8 mov %edi,%eax
c0293b2e: e8 7d 5d 0a 00 call 0xc03398b0
c0293b33: 8d 83 20 01 00 00 lea 0x120(%ebx),%eax
c0293b39: e8 d2 3b 2e 00 call 0xc0577710
c0293b3e: 8b 83 f4 00 00 00 mov 0xf4(%ebx),%eax
c0293b44: e8 e7 ba f5 ff call 0xc01ef630
c0293b49: 89 d8 mov %ebx,%eax
c0293b4b: e8 e0 ba f5 ff call 0xc01ef630
c0293b50: 83 c4 28 add $0x28,%esp
c0293b53: 5b pop %ebx
c0293b54: 5e pop %esi
c0293b55: 5f pop %edi
c0293b56: 5d pop %ebp
c0293b57: c3 ret
c0293b58: e8 e3 db f4 ff call 0xc01e1740
c0293b5d: 8d 76 00 lea 0x0(%esi),%esi
c0293b60: e9 0b ff ff ff jmp 0xc0293a70
c0293b65: 8d 76 00 lea 0x0(%esi),%esi
c0293b68: 8b 86 84 01 00 00 mov 0x184(%esi),%eax
c0293b6e: ba 01 00 00 00 mov $0x1,%edx
c0293b73: 8b 40 38 mov 0x38(%eax),%eax
c0293b76: 83 60 60 fb andl $0xfffffffb,0x60(%eax)
c0293b7a: 0f b7 43 58 movzwl 0x58(%ebx),%eax
c0293b7e: 66 89 47 3a mov %ax,0x3a(%edi)
c0293b82: 89 f0 mov %esi,%eax
c0293b84: e8 67 e5 ff ff call 0xc02920f0
c0293b89: e9 3e fe ff ff jmp 0xc02939cc
c0293b8e: 66 90 xchg %ax,%ax
c0293b90: ba 01 00 00 00 mov $0x1,%edx
c0293b95: 89 f0 mov %esi,%eax
c0293b97: e8 54 e5 ff ff call 0xc02920f0
c0293b9c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
c0293ba0: e9 e0 fd ff ff jmp 0xc0293985
c0293ba5: 89 34 24 mov %esi,(%esp)
c0293ba8: c7 44 24 08 bf 9c 6c movl $0xc06c9cbf,0x8(%esp)
c0293baf: c0
c0293bb0: c7 44 24 04 64 3e 59 movl $0xc0593e64,0x4(%esp)
c0293bb7: c0
c0293bb8: e8 d3 f1 ff ff call 0xc0292d90
c0293bbd: e9 e4 fd ff ff jmp 0xc02939a6
c0293bc2: 8b 4b 3c mov 0x3c(%ebx),%ecx
c0293bc5: e9 64 fe ff ff jmp 0xc0293a2e
c0293bca: 8b 43 38 mov 0x38(%ebx),%eax
c0293bcd: 8b 80 e8 00 00 00 mov 0xe8(%eax),%eax
c0293bd3: 89 55 e8 mov %edx,-0x18(%ebp)
c0293bd6: c7 44 24 08 be a9 6c movl $0xc06ca9be,0x8(%esp)
c0293bdd: c0
c0293bde: c7 44 24 04 b9 0c 6a movl $0xc06a0cb9,0x4(%esp)
c0293be5: c0
c0293be6: 89 44 24 0c mov %eax,0xc(%esp)
c0293bea: 89 34 24 mov %esi,(%esp)
c0293bed: e8 be d8 ff ff call 0xc02914b0
c0293bf2: c7 04 24 f6 9c 6c c0 movl $0xc06c9cf6,(%esp)
c0293bf9: e8 4d 2e 2e 00 call 0xc0576a4b
c0293bfe: 8b 83 38 01 00 00 mov 0x138(%ebx),%eax
c0293c04: 8b 55 e8 mov -0x18(%ebp),%edx
c0293c07: 89 45 f0 mov %eax,-0x10(%ebp)
c0293c0a: 89 55 ec mov %edx,-0x14(%ebp)
c0293c0d: 8b 55 f0 mov -0x10(%ebp),%edx
c0293c10: 8b 02 mov (%edx),%eax
c0293c12: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
c0293c16: 39 55 ec cmp %edx,-0x14(%ebp)
c0293c19: 75 13 jne 0xc0293c2e
c0293c1b: 8b 55 ec mov -0x14(%ebp),%edx
c0293c1e: 3b 93 38 01 00 00 cmp 0x138(%ebx),%edx
c0293c24: 0f 84 a6 fe ff ff je 0xc0293ad0
c0293c2a: 0f 0b ud2a
c0293c2c: eb fe jmp 0xc0293c2c
c0293c2e: 8b 55 f0 mov -0x10(%ebp),%edx
c0293c31: 8b 45 f0 mov -0x10(%ebp),%eax
c0293c34: 83 c2 20 add $0x20,%edx
c0293c37: 8b 4a c0 mov -0x40(%edx),%ecx
c0293c3a: 83 e8 68 sub $0x68,%eax
c0293c3d: 89 4c 24 18 mov %ecx,0x18(%esp)
c0293c41: 8b 88 b0 00 00 00 mov 0xb0(%eax),%ecx
c0293c47: 89 4c 24 14 mov %ecx,0x14(%esp)
c0293c4b: 0f b7 88 fa 00 00 00 movzwl 0xfa(%eax),%ecx
c0293c52: 89 54 24 0c mov %edx,0xc(%esp)
c0293c56: 89 4c 24 10 mov %ecx,0x10(%esp)
c0293c5a: 8b 90 a8 00 00 00 mov 0xa8(%eax),%edx
c0293c60: 89 54 24 08 mov %edx,0x8(%esp)
c0293c64: 8b 80 2c 01 00 00 mov 0x12c(%eax),%eax
c0293c6a: c7 04 24 54 b0 6b c0 movl $0xc06bb054,(%esp)
c0293c71: 05 64 01 00 00 add $0x164,%eax
c0293c76: 89 44 24 04 mov %eax,0x4(%esp)
c0293c7a: e8 cc 2d 2e 00 call 0xc0576a4b
c0293c7f: 8b 55 f0 mov -0x10(%ebp),%edx
c0293c82: 8b 12 mov (%edx),%edx
c0293c84: 89 55 f0 mov %edx,-0x10(%ebp)
c0293c87: eb 84 jmp 0xc0293c0d
c0293c89: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
The rest snipped.
>> Jul 29 19:55:36 ini kernel: [ 3044.823044]
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] Pid: 1299, comm: umount Not tainted (2.6.32-22-386 #36-Ubuntu) X5DPA
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] EIP: 0060:[<c0293c2a>] EFLAGS: 00010206 CPU: 0
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] EIP is at ext4_put_super+0x2ea/0x350
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] EAX: c2c28ea8 EBX: c307f000 ECX: ffffff52 EDX: c307f138
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] ESI: ca228a00 EDI: c307f0fc EBP: cec6ff30 ESP: cec6fefc
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] c06bb054 ca228b64 0000800b c2c28ec8 00008180 00000001 00000000 c307f138
>> Jul 29 19:55:36 ini kernel: [ 3044.823044]<0> c307f138 c307f138 ca228a00 c0593c80 c023b310 cec6ff48 c01fc60d ca228ac0
>> Jul 29 19:55:36 ini kernel: [ 3044.823044]<0> cec6ff44 cf328400 00000003 cec6ff58 c01fc6ca ca228a00 c0759d80 cec6ff6c
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c023b310>] ? vfs_quota_off+0x0/0x20
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c01fc60d>] ? generic_shutdown_super+0x4d/0xe0
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c01fc6ca>] ? kill_block_super+0x2a/0x50
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c01fd4e4>] ? deactivate_super+0x64/0x90
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c021282f>] ? mntput_no_expire+0x8f/0xe0
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c0212e47>] ? sys_umount+0x47/0xa0
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c0212ebe>] ? sys_oldumount+0x1e/0x20
>> Jul 29 19:55:36 ini kernel: [ 3044.823044] [<c01033ec>] ? syscall_call+0x7/0xb
>> Jul 29 19:55:36 ini kernel: [ 3045.299442] ---[ end trace 426db011a0289db3 ]---
> ...
>> Another test. Everything is as before, only I did not pull the cable, but
>> deleted the corresponding LUN on the target, so all the command starting
>> from this moment failed. Then on umount system rebooted. Kernel log:
>
> Nasty. But the log actually contains only traces of processes in D state
> (generally waiting for a page to be unlocked). Do you have any sort of
> watchdog which might have rebooted the machine?
I didn't configured it ;). This is unmodified Ubuntu server 10.04, only with non-PAE kernel.
The reboot wasn't immediate. I even tried to check something in another ssh.
Again, you can find more logs attached to the original message.
> Thanks for running the test.
Thanks for looking at the results!
Vlad
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