Re: xen problem with save/restore

["Jérôme Petazzoni" <jp@enix.org>]

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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