[syslinux] Plop Boot Manager quit working with 5.10

Gene Cumm gene.cumm at gmail.com
Mon Jul 8 12:16:37 PDT 2013

On Mon, Jul 8, 2013 at 3:05 PM, H. Peter Anvin <hpa at zytor.com> wrote:
> On 06/30/2013 09:45 AM, Gene Cumm wrote:
>> My cuent understanding is as follows: HPA is using the label "ancient
>> kernel" for any kernel that has a hard-coded load address and that
>> linux.c32 and all 5.xx+ (they're actually the same code) are less
>> likely to be able to succeed in loading these kernels due to how the
>> core/linux.c32 responds to the memory map passed to it by the BIOS(INT
>> 15h E820h).
> Not quite.
> "Ancient kernel" means Linux kernel boot protocol < 2.00.  This
> hard-codes memory use at address 0x90000, which is almost universally
> occupied by the PXE stack.
> What we need to do is estimate how much memory will be freed up by the
> PXE stack on unload -- unless we are doing keeppxe -- and if we have
> used that memory and the unload fail... print a warning and run anyway?

Thanks for the clarification.


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