[OLPC-devel] Re: suggested requirement for new kernels and initrds: must boot under qemu and/or kexec as kernel and initrd before release as a stream

[Marcelo Tosatti]

On Wed, Jul 05, 2006 at 08:37:10AM -0600, Jordan Crouse wrote:
> > Are you using serial console? Otherwise CONFIG_VGA_NOPROBE makes the
> > console not work. Can we disable that for now and use VGA console?
> 
> I think we can do that pretty easily - we'll just add a qemu defconfig for
> the kernel and use it based on a flag.
> 
> > Other than that, I think CONFIG_MGEODE_LX=y might cause problems in qemu.
> 
> Really?  All that basically does is enable MMX and set a 32 byte cache
> line. qemu should be able to handle that, should it not?

Right, it does not cause a problem for qemu. Bad guess.

> > Jordan, can you please change the CPU type to generic i386 in defconfig?
> > 
> > It shrinks bzImage by about 16k.
> 
> Just to play devils advocate, going to i386 will be a performance 
> tradeoff - we'll lose the MMX memcpy.  Is that deemed acceptable?

I think its worthwile as Ronald mentioned.

> Somebody send me a qemu .config for the kernel and I'll add it to buildrom.

Just need to disable _VGA_NOPROBE from the current .config...