On 8/16/05, Rick Wagner <wagnerric@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Thanks Klaasjan. This was very helpful. > > It mentions the PCI bus limitation, but I'm wondering about PCI-X and PCI-E, > which I think go beyond 32 bit addresses. I'll keep digging, and see if > there are more up to date articles; this one was based on 2.4, with mention > of 2.6. > Most (all?) new systems based on PCI-E/X sold now are able to run in 64-bits mode, which totally obsoletes highmem and other hacks. Are you looking for an answer to a specific question regarding configurations with lots of memory? Klaasjan