Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?

[Avi Kivity]

 On 08/04/2010 04:52 PM, Anthony Liguori wrote:
> > >
> > This is not like DMA event if done in chunks and chunks can be pretty
> > big. The code that dials with copying may temporary unmap some pci
> > devices to have more space there.
>
>
> That's a bit complicated because SeaBIOS is managing the PCI devices 
> whereas the kernel code is running as an option rom.  I don't know the 
> BIOS PCI interfaces well so I don't know how doable this is.
>
> Maybe we're just being too fancy here.
>
> We could rewrite -kernel/-append/-initrd to just generate a floppy 
> image in RAM, and just boot from floppy.

How could this work?  the RAM belongs to SeaBIOS immediately after 
reset, it would just scribble over it.  Or worse, not scribble on it 
until some date in the future.

-kernel data has to find its way to memory after the bios gives control 
to some optionrom.  An alternative would be to embed knowledge of 
-kernel in seabios, but I don't think it's a good one.

--
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