Re: [Xen-devel] Xen hypervisor hangs on booting against c/s 16925

[Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>]

On Tue, 29 Jan 2008 10:36:57 +0000
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

> How about we just map the whole megabyte UC- at start of day? We rarely
> touch anything down there and when we do it'll mostly be BIOS tables (hence
> in ROM and hence not marked as RAM in e820 

Most BIOS tables are in RAM because they are built each boot. Mapping the
low 640K UC is also going to suprise the BIOS somewhat and seems to be
asking for trouble.

The MTRR mappings for the low 1Mb are special anyway and aligned with the
need for 640K RAM and a following ISA hole.

Alan

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