Re: Kernel with very low memory requirement (~12MB) for domU

["Rickard Borgmäster" <doktorn@sub.nu>]

CJ van den Berg wrote:
> 
> "big" is relative I guess. :-) That's about as small as it gets for my
> purposes (which is testing netfilter modules).

Well, I had a hard time convincing myself that someone would need 802.11 
drivers in a domU kernel... ;-)

>># xm crate -c crab-domU.cfg name=test1
>>Using config file "crab-domU.cfg".
>>Started domain test1
>>#
>>
>>xm list only returns Domain-0 :-(
> 
> 
> I've had plenty of strange things like this happen when the memory
> parameter was border line too small. If it works once though it seems to
> work always.

Of course I've tried to adjust the memory parameter so that shouldn't be 
  the limiting factor. I do of course want to see that the new kernel 
will start at all, before trying to get it to boot at ~12MB. However, 
even after setting memory to 54 it won't start.

> If you want you can post your crab-domU.cfg here. That might shed more
> light on the problem. I can try booting my local build of that kernel
> config with it too.

Well... it isn't very sophisticated but here goes:

kernel = "/boot/vmlinuz-2.6.16-rc1-vdberg-xenU"
memory = 54
disk = ['cow:/crab/.xen/crab-domU.cfg 30,hda1,w']
root = "/dev/hda1 ro"

>>Will try a "normal" 2.6.16-rc1 kernel compile now.
> 
> I would imagine that would be a *lot* fatter.

I never did that. Instead, I started over and configured myself a new 
2.6.16-rc1 kernel. But... that didn't boot either. Now, I think I have 
to try compile a *stock* 2.6.16-rc1 kernel to see if that will boot at 
all. Something is wrong.

Oh... just got a thought.. Do the dom0 kernel have to be 2.6.16-rc1 
aswell...?

Best regards
Rickard Borgmäster