Re: problem : quantity of memory available
On Thursday 28 October 2004 18:46, Lennart Sorensen wrote:
> On Thu, Oct 28, 2004 at 12:53:20PM -0400, Levi Bard wrote:
> > Highmem (>4GB) may not be enabled in that kernel? Can you search for
> > it in the config? (/proc/kconfig ?)
> HIGHMEM on a 64bit system? I know the amd64 is x86 based, but still,
> does it need that?
Amd64 can access all memory directly, so doesn't have or need highmem.
The highmem/lowmem distinction only applies to 32-bit kernels.
 em64t cpus don't have an IOMMU, so have to bounce all IO through buffers
in th first 4G of memory, but that's something different.