[Lguest] trap 13 problems

[Brian Jackson]

Rusty Russell wrote:
> On Mon, 29 Jun 2009 03:36:30 am Brian Jackson wrote:
>> Nevermind the above. I figured out I didn't have LGUEST_GUEST turned on
>> for some reason. I'm sure I turned it on when I turned on LGUEST, but
>> I'm just a meat bag. Might be a nice thing to add to the FAQ...
> 
> The problem is that trap 13 tends to be what happens when a guest does 
> something bad early on.  We could offer a hint if there was no LHCALL_INIT call 
> but it would only be a guess...
> 
>> I also tried inside a non-paravirt 32bit kvm instance and got:
>>
>> lguest: unhandled trap 13 at 0xc100af77 (0xd8)
>>
>> Anybody got any ideas to test out?
> 
> If this is a correctly-configured kernel, please send your .config...


I think it is. At least I went back and checked the docs and checked 
what it said this time.

The interesting bits:

egrep '(LGUEST|PARAVIRT|HIGHMEM|ALIGN|PAE)' /usr/src/linux/.config
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_PARAVIRT_GUEST=y
CONFIG_LGUEST_GUEST=y
CONFIG_PARAVIRT=y
CONFIG_PARAVIRT_SPINLOCKS=y
# CONFIG_PARAVIRT_CLOCK is not set
# CONFIG_PARAVIRT_DEBUG is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y
CONFIG_PHYSICAL_ALIGN=0x100000
# CONFIG_DEBUG_HIGHMEM is not set


full config is gzip'ed and attached since I wasn't sure it would get to 
the list otherwise.

--Brian Jackson


> 
> Thanks!
> Rusty.
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