UEFI Compatibility Issues in Fedora 10

[Brian Maly]

jonathan barkelew wrote:
>
>
> The second issue is far more pressing, and much more difficult to 
> solve. The linux kernel will behave
> incorrectly if more than 400k of runtime memory is declared by system 
> firmware. The kernel attempts
> to map all UEFI runtime memory into the kernel fixmap table, and any 
> requests to map more than 400k
> are silently ignored. If this memory is accessed later in the boot 
> process (after transition to virtual
> mode), the kernel will panic. It is my understanding that this 
> mechanism was designed to enable kexec
> functionality, but this mechanism is UEFI non-compliant. If Fedora is 
> ever to be reliably booted on
> UEFI systems, this issue must be addressed.
>
BTW, I can also forward you the patches for this if you need to use an 
older kernel for some reason. Let me know...

Brian

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