Re: [Xen-devel] xen problem with save/restore

[Jérôme Petazzoni <jp@xxxxxxxx>]

Paul Larson wrote:

> 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
>  
[...]

I had exactly this problem with exactly the same setup (xen-2.0-testing 
on sarge).
Ian told that he would be interested with the vmlinux* files (not the 
vmlinuz ; those with the debug symbols, if I understood correctly).
I couldn't yet reproduce this bug (I recompiled the kernels with 
iptables support, and now the domain crashes on restoring without any 
message ; and I will get physical access to the machines this week-end 
only - and then apply the patch to show all kernel messages from all 
domains on the console, to guess what's happening).
I don't think Debian is at the source of the problem :-) ... but the 
precise version of gcc could be. FYI, I was using gcc-3.3.5 (I compiled 
my kernels on my "fast" sid box, not on the xen box). Which gcc are you 
using ?

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