Hello,

        I have a problem, when I backup a xen debian squeeze I have crash on
the kernel on the vm :

Feb 15 22:03:32 aldebaran kernel: [173399.180601] Pid: 12229, comm: tar
Tainted: G      D    2.6.32-5-xen-amd64 #1
Feb 15 22:03:32 aldebaran kernel: [173399.180605] RIP:
e030:[<ffffffff8103243e>]  [<ffffffff8103243e>] kern_addr_valid+0x67/0xf9
Feb 15 22:03:32 aldebaran kernel: [173399.180613] RSP:
e02b:ffff88007d8c5e90  EFLAGS: 00010206
Feb 15 22:03:32 aldebaran kernel: [173399.180617] RAX: 0000155555555000
RBX: 0000000000001000 RCX: ffff800000000000
Feb 15 22:03:32 aldebaran kernel: [173399.180622] RDX: 0000155555555000
RSI: 00003ffffffff000 RDI: 000000023fdfe067
Feb 15 22:03:32 aldebaran kernel: [173399.180627] RBP: 0000000000000c00
R08: ffff880000000000 R09: ffffffff81476980
Feb 15 22:03:32 aldebaran kernel: [173399.180632] R10: 0000000000000000
R11: ffffffff81154539 R12: ffff800000000000
Feb 15 22:03:32 aldebaran kernel: [173399.180636] R13: 0000000000000c00
R14: 0000000000001000 R15: 0000000001dbcc00
Feb 15 22:03:32 aldebaran kernel: [173399.180645] FS:
00007fe9b20e6700(0000) GS:ffff880003813000(0000) knlGS:0000000000000000
Feb 15 22:03:32 aldebaran kernel: [173399.180650] CS:  e033 DS: 0000 ES:
0000 CR0: 000000008005003b
Feb 15 22:03:32 aldebaran kernel: [173399.180655] CR2: ffff9d5555555000
CR3: 000000000245b000 CR4: 0000000000002660
Feb 15 22:03:32 aldebaran kernel: [173399.180660] DR0: 0000000000000000
DR1: 0000000000000000 DR2: 0000000000000000
Feb 15 22:03:32 aldebaran kernel: [173399.180665] DR3: 0000000000000000
DR6: 00000000ffff0ff0 DR7: 0000000000000400
Feb 15 22:03:32 aldebaran kernel: [173399.180670] Process tar (pid:
12229, threadinfo ffff88007d8c4000, task ffff88007e323170)
Feb 15 22:03:32 aldebaran kernel: [173399.180675] Stack:
Feb 15 22:03:32 aldebaran kernel: [173399.180677]  ffffffff8113a019
ffff88007d8c5f50 ffff880002c09780 fffffffffffffffb
Feb 15 22:03:32 aldebaran kernel: [173399.180684] <0> ffff88007e75ed80
ffff88007d8c5f50 0000000000001c00 0000000001dbbc00
Feb 15 22:03:32 aldebaran kernel: [173399.180693] <0> ffffffff81132165
ffff88004b264bb8 0000000000001c00 ffff88007e75ed80
Feb 15 22:03:32 aldebaran kernel: [173399.180702] Call Trace:
Feb 15 22:03:32 aldebaran kernel: [173399.180709]  [<ffffffff8113a019>]
? read_kcore+0x22d/0x2a6
Feb 15 22:03:32 aldebaran kernel: [173399.180715]  [<ffffffff81132165>]
? proc_reg_read+0x6f/0x8a
Feb 15 22:03:32 aldebaran kernel: [173399.180721]  [<ffffffff810f0784>]
? vfs_read+0xa6/0xff
Feb 15 22:03:32 aldebaran kernel: [173399.180727]  [<ffffffff8100ecdf>]
? xen_restore_fl_direct_end+0x0/0x1
Feb 15 22:03:32 aldebaran kernel: [173399.180733]  [<ffffffff810f0899>]
? sys_read+0x45/0x6e
Feb 15 22:03:32 aldebaran kernel: [173399.180738]  [<ffffffff81011b42>]
? system_call_fastpath+0x16/0x1b
Feb 15 22:03:32 aldebaran kernel: [173399.180742] Code: 47 81 48 89 c2
48 89 c8 48 be 00 f0 ff ff ff 3f 00 00 48 c1 e8 1b 48 21 f2 49 b8 00 00
00 00 00 88 ff ff 25 f8 0f 00 00 48 01 d0 <4a> 8b 3c 00 48 85 ff 0f 84
82 00 00 00 ff 14 25 f0 ed 47 81 48
Feb 15 22:03:32 aldebaran kernel: [173399.180800] RIP
[<ffffffff8103243e>] kern_addr_valid+0x67/0xf9
Feb 15 22:03:32 aldebaran kernel: [173399.180806]  RSP <ffff88007d8c5e90>
Feb 15 22:03:32 aldebaran kernel: [173399.180809] CR2: ffff9d5555555000
Feb 15 22:03:32 aldebaran kernel: [173399.180814] ---[ end trace
d838a5a833934972 ]---

vm kernel : 2.6.32-5-xen-amd64

Xen Version : 4.0.1

Any ideas ?

Sincerely
-- 
                         ''~``
                        ( o o )
+------------------.oooO--(_)--Oooo.---------------------+
| Guillaume Chéramy - Guidtz                             |
| French open source system administrator                |
| E-Mail : guillaume AT cheramy DOT name                        |
| Website : http://blog.cheramy.name                     |
|                                                        |
|                    (   )                               |
+---------------------\ (----(   )-----------------------+
                       \_)    ) /
                             (_/

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