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

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
printing eip:
*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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