[Drbd-dev] DRBD8: Kernel Oops in _drbd_send_page+0x1f/0x120

[Montrose, Ernest]

Hi all,
We are seeing an oops in _drbd_send_page() it seems like we are having
SIZE issues with the bio list. I am not
Able to state the cause nor am I able to reproduce it consistently.  I
hope someone might have a better idea.
Below is the full message:
 
Dec 11 05:46:26 chong kernel: xenbr0: port 4(vif31.0) entering disabled
state
Dec 11 05:48:15 chong kernel: drbd1: role( Primary -> Secondary )
Dec 11 05:48:18 chong kernel: drbd1: Writing meta data super block now.
Dec 11 05:48:18 chong kernel: drbd1: peer( Secondary -> Primary )
Dec 11 05:55:40 chong kernel: drbd0: peer( Primary -> Secondary )
Dec 11 05:55:40 chong kernel: drbd0: role( Secondary -> Primary )
Dec 11 05:55:40 chong kernel: drbd0: Writing meta data super block now.
netbk: WARNING: device 'vif32.0' has non-zero queue length (32)!
Dec 11 05:55:40 chong kernel: netbk: WARNING: device 'vif32.0' has
non-zero queue length (32)!
Dec 11 05:55:42 chong kernel: device vif32.0 entered promiscuous mode
Dec 11 05:56:04 chong kernel: xenbr0: port 3(vif32.0) entering learning
state
Dec 11 05:56:04 chong kernel: xenbr0: topology change detected,
propagating
Dec 11 05:56:04 chong kernel: xenbr0: port 3(vif32.0) entering
forwarding state
Dec 11 05:56:20 chong kernel: drbd1: peer( Primary -> Secondary )
Dec 11 05:56:21 chong kernel: drbd1: role( Secondary -> Primary )
Dec 11 05:56:21 chong kernel: drbd1: Writing meta data super block now.
netbk: WARNING: device 'vif33.0' has non-zero queue length (32)!
Dec 11 05:56:21 chong kernel: netbk: WARNING: device 'vif33.0' has
non-zero queue length (32)!
Unable to handle kernel paging request at virtual address 5c65415f
 printing eip:
f12bc71f
*pde = ma 00000000 pa fffff000
Oops: 0000 [#1]
Modules linked in: iptable_filter ip_tables x_tables drbd ipmi_devintf
ipmi_si ipmi_msghandler video thermal processor fan button battery ac
e1000
CPU:    0
EIP:    0061:[<f12bc71f>]    Not tainted VLI
EFLAGS: 00010286  (2.6.16.29-xen0 #1)
EIP is at _drbd_send_page+0x1f/0x120 [drbd]
eax: ffffffff  ebx: ca82ccbc  ecx: ec048000  edx: 5c65415f
esi: 00001000  edi: c14a7fc0  ebp: ec049eec  esp: ec049ec0
ds: 007b  es: 007b  ss: 0069
Process drbd0_worker (pid: 4779, threadinfo=ec048000 task=ec6e9a30)
Stack: <0>ec626380 c1011c40 00000000 00001000 00004000 ec048000 00000020
ffffffff
      ca82ccbc 00000001 cddfab00 ec049f10 f12bc85f ee71f800 5c65415f
00001000
      c14a7fc0 ec049f38 00008000 00000001 ec049f64 f12bc99f ee71f800
cddfab00
Call Trace:
 [<c010522a>] show_stack_log_lvl+0xaa/0xe0
 [<c010543e>] show_registers+0x18e/0x210
 [<c0105639>] die+0xd9/0x180
 [<c011329c>] do_page_fault+0x3cc/0x6ce
 [<c0104e3b>] error_code+0x2b/0x30
 [<f12bc85f>] _drbd_send_zc_bio+0x3f/0x60 [drbd]
 [<f12bc99f>] drbd_send_dblock+0x11f/0x200 [drbd]
 [<f12a8ef1>] w_send_dblock+0x21/0xb0 [drbd]
 [<f12a98a8>] drbd_worker+0x268/0x355 [drbd]
 [<f12bb323>] drbd_thread_setup+0x73/0xd0 [drbd]
 [<c0102d7d>] kernel_thread_helper+0x5/0x18
Code: c3 8d 74 26 00 8d bc 27 00 00 00 00 55 b9 00 e0 ff ff 89 e5 57 56
53 83 ec 20 8b 55 0c 21 e1 8b 41 18 8b 7d 14 8b 75 10 89 45 f0 <8b> 02
89 fb f6 c4 40 74 03 8b 52 0c 8b 42 04 40
85 c0 7e 09 8b
 <0>Fatal exception: panic in 5 seconds
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