Re: Case: 7454422: Re: Kernel 2.6.21.3 does not work with 8GB of RAM on Intel 965WH motherboards. (FULL DMESG)

Parag Warudkar
2007-05-31T12:49:56Z

Robert Hancock wrote:
> I think that mem=8832M would work as well, to make the kernel use only
> the memory that is marked cacheable. (It looks like this parameter
> takes the highest memory address we want the kernel to use, not the
> highest memory amount.)
>
Yep, and that would be much easier too.

I am curious though as this seems to be somewhat common a problem, could
we make the kernel analyze which memory is not cacheable (it already
knows this via MTRR) and not use that portion for anything? Plus may be
warn the user to contact their BIOS vendor to correct the problem?

I think that would be possible - even if the kernel knows late that the
memory was uncached we could migrate those pages in that region to
someplace else?

Parag