Re: X86_64 kernel support MAX memory.

[Andi Kleen]

On Mon, Feb 14, 2005 at 07:32:42PM -0800, YhLu wrote:
> Andi,
> 
> How much is max RAM 2.6.11 x86_64 support on AMD64?
> 64G or 128G?

46bits in theory (64TB), however current CPUs only support
upto 40bits (AMD) or 36bits (Intel).  There is some other
code that is also limited to 40bits right now like AGP
or IOMMU or MTRR, that is all due to hardware limitations.

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/