[openib-general] OOPS: ib_mad crashery on bootup

[Sean Hefty]

I've been able to hit an issue in the MAD layer that might be related.  I 
still do not know the root cause, however.

- Sean


cmpost: starting client
cmpost: connecting
cmpost: connect time: 4479000 us
cmpost: completing data transfers
cmpost: waiting to disconnect
cmpost: test complete
Unable to handle kernel paging request at virtual address 6b6b6b83
  printing eip:
f8ca36e2
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: ib_cmpost ib_cm ib_sa ib_mthca ib_mad ib_core edd st 
sr_mod ide_cd cdrom thermal processor fan button battery ac e100 mii e1000 
hw_random uhci_hcd usbcore evdev reiserfs aic7xxx sd_mod scsi_mod
CPU:    0
EIP:    0060:[pg0+948262626/1069220864]    Not tainted VLI
EIP:    0060:[<f8ca36e2>]    Not tainted VLI
EFLAGS: 00010292   (2.6.9)
EIP is at ib_mad_send_done_handler+0x12/0x120 [ib_mad]
eax: dfda185c   ebx: c5cf4790   ecx: c967855c   edx: d92e9f24
esi: 6b6b6b6b   edi: d92e9f24   ebp: c5cf4790   esp: d92e9f04
ds: 007b   es: 007b   ss: 0068
Process ib_mad1 (pid: 4493, threadinfo=d92e8000 task=f7738230)
Stack: 00000001 d92e9f24 d810795c f6c6f5bc dfda185c d92e9f24 dfda185c f8ca3979
        c5cf4790 00000000 00000000 00000000 d92e9f58 c011e4f9 00000000 00000402
        00000006 00000000 0001f341 f7612c30 dfda18cc f7612c30 dfda18d0 c01305f8
Call Trace:
  [pg0+948263289/1069220864] ib_mad_completion_handler+0x89/0xa0 [ib_mad]
  [<f8ca3979>] ib_mad_completion_handler+0x89/0xa0 [ib_mad]
  [__wake_up+41/64] __wake_up+0x29/0x40
  [<c011e4f9>] __wake_up+0x29/0x40
  [worker_thread+424/560] worker_thread+0x1a8/0x230
  [<c01305f8>] worker_thread+0x1a8/0x230
  [pg0+948263152/1069220864] ib_mad_completion_handler+0x0/0xa0 [ib_mad]
  [<f8ca38f0>] ib_mad_completion_handler+0x0/0xa0 [ib_mad]
  [default_wake_function+0/16] default_wake_function+0x0/0x10
  [<c011e460>] default_wake_function+0x0/0x10
  [default_wake_function+0/16] default_wake_function+0x0/0x10
  [<c011e460>] default_wake_function+0x0/0x10
  [worker_thread+0/560] worker_thread+0x0/0x230
  [<c0130450>] worker_thread+0x0/0x230
  [kthread+136/176] kthread+0x88/0xb0
  [<c0134128>] kthread+0x88/0xb0
  [kthread+0/176] kthread+0x0/0xb0
  [<c01340a0>] kthread+0x0/0xb0
  [kernel_thread_helper+5/16] kernel_thread_helper+0x5/0x10
  [<c0105275>] kernel_thread_helper+0x5/0x10
Code: 00 6a 00 e8 11 ae 47 c7 5d eb 98 8d b4 26 00 00 00 00 8d bc 27 00 00 
00 00 55 57 56 53 83 ec 0c 89 54 24 04 8b 1a 89 dd 8b 73 08 <8b> 46 18 89 04 
24 eb 50 8d b6 00 00 00 00 8b 54 24 04 89 d8 e8