On Mon, May 13, 2024 at 11:43:09AM +0200, Oscar Salvador wrote: > On Fri, May 10, 2024 at 11:03:58PM +0100, Matthew Wilcox wrote: > > I'm a little concerned about having this conversation without the > > affected architecture maintainers in the room. However, I can speak to > > PA-RISC. > > Yes, having the architecture maintainers would be great. > > > Early models have a dense memory layout and we need not be concerned > > with them. I'm not quite sure about the PA-7200 to PA-8500 ccio based > > machines, would need to do some research. For the PA-8500+ astro based > > machines, the 256MB that would be in the range 3.75GB to 4GB is > > relocated to 67.75-68GB to leave space for PCI mmio. So if you have > > a machine with 8GB of memory (fairly typical for a J6000 machine), > > you'd have three ranges of memory: > > > > 0-3.75GB > > 4-8GB > > 67.75-68GB > > > > and I'd like to see an analysis of how laying out memmap would differ > > for those machines. > > Maybe Mike can prove me wrong, but I assume that memblock will report > the above ranges as memory, and the 3.75GB to 4GB as somewhat reserved. The populated ranges will be reported as memory and it seems that there just will be a hole at the 3.75GB-4GB range. Not that it's important from the sections layout perspective. > -- > Oscar Salvador > SUSE Labs > -- Sincerely yours, Mike.
