Re: [Etherboot-developers] [Patch] E820 Memory support....

[Vasil V. <vas...@sy...>]

On 6 Dec 2001, Eric W. Biederman wrote:

> When this has been previously discussed it was decided to drop
> it because applications can get their own memory size.  But...
> I just ran into a machine with 6GiB of ram where the legacy
> routines tell me I only have 64MiB of ram.  Which is painful.
>
> The immediate problem is that at 64MiB and older kernels will
> over write the ramdisk.

How old kernels. I am using 2.2.16 on machine with 256MB but the BIOS
reporting 66559KB (65535+1024) and mknbi rounding it down to 65556KB. It even
works when the kernel is forced by a boot option to think there is 256MB.

> So I have update etherboot so that it will query the E820 memory
> map so it has a true picture of what the memory layout is.  Doing
> this I have more freedom to locate ramdisk etc.

I was looking at kernel 2.4 and it appeared that the ramdisk cannot be in the
upper memory (above 1GB or so).


Vasil