[Linux-ia64] Re: 64 Bits DMA Addresses for Alloc Consistent Interfaces.

David S. Miller
2003-05-15T23:42:59Z

From: Colin Ngam <cngam@sgi.com>
Date: Thu, 15 May 2003 17:44:57 -0500

However, in PCI-X mode, we do not have the capability to generate
SAC addresses.

The device can generate addresses that have the top-32bits 0 though.

You problem is rather that you cannot guarentee to be able to allocate
physical memory which is <4GB on each and every node.

That is very different from a "PCI-X issue". It is a "this NUMA
platform" issue.