xen problem with save/restore

[Paul Larson <plars@linuxtestproject.org>]

I think I've seen something similar to this posted recently, but I can't
find the message to reply to.  I build xen-2.0-testing from source
yesterday.  I have debian sarge running on all my domains right now.  I
was trying the save/restore feature out, and got this after restoring
and consoling into a session:

************ REMOTE CONSOLE: CTRL-] TO QUIT ********
Unable to handle kernel NULL pointer dereference at virtual address
00000007
 printing eip:
c030e587
*pde = ma 00000000 pa 55555000
 [<c0109f80>] __do_suspend+0x19f/0x1e0

 [<c012ca65>] worker_thread+0x22b/0x32f

 [<c010a088>] __shutdown_handler+0x0/0x48

 [<c01196c0>] default_wake_function+0x0/0x12

 [<c01196c0>] default_wake_function+0x0/0x12

 [<c012c83a>] worker_thread+0x0/0x32f

 [<c0130b89>] kthread+0xa5/0xab

 [<c0130ae4>] kthread+0x0/0xab

 [<c010f411>] kernel_thread_helper+0x5/0xb

Oops: 0002 [#1]
PREEMPT DEBUG_PAGEALLOC
Modules linked in:
CPU:    0
EIP:    0061:[<c030e587>]    Not tainted VLI
EFLAGS: 00010203   (2.6.9-xenU)
EIP is at init_tsc+0x4b/0x9e
eax: c02c6dd4   ebx: 0000c000   ecx: fbffc000   edx: 00000001
esi: 00000010   edi: c0102000   ebp: 00000000   esp: c0039f04
ds: 007b   es: 007b   ss: 0069
Process events/0 (pid: 3, threadinfo=c0038000 task=c003cac0)
Stack: c010eadd 00000000 c0109f80 fbffc000 000001e1 00000063 8ed0dd7b
00000042
       c02c3200 c2dc5000 c02c5d80 00000000 c0038000 00000000 c012ca65
00000000
       c0039f74 00000000 c003bf10 c0038000 c0038000 c0038000 c010a088
c0038000
Call Trace:
 [<c010eadd>] time_resume+0x12/0x51

 [<c0109f80>] __do_suspend+0x19f/0x1e0

 [<c012ca65>] worker_thread+0x22b/0x32f

 [<c010a088>] __shutdown_handler+0x0/0x48

 [<c01196c0>] default_wake_function+0x0/0x12

 [<c01196c0>] default_wake_function+0x0/0x12

 [<c012c83a>] worker_thread+0x0/0x32f

 [<c0130b89>] kthread+0xa5/0xab

 [<c0130ae4>] kthread+0x0/0xab

 [<c010f411>] kernel_thread_helper+0x5/0xb

Code: 00 00 00 00 00 00 00 00 70 0d 5a f6 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 21 00 00 00 00 00 <00> 4e
f7 ac 41 c8 a8 af 41 61 21 4c 41 00 00 00 00 00 00 01 00

I'm just starting to play with xen, so I haven't figured out much of the
debugging stuff yet.  If someone can point me in the right direction
though, I'd be happy to try to collect some more data if there's
anything that would be useful.

Thanks,
Paul Larson



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