On Fri, Oct 20, 2017 at 11:27:41AM -0400, Jim Quinlan wrote: > memc0-a@[ 0....3fffefff] <=> pci@[ 0....3fffefff] > memc0-b@[100000000...13fffefff] <=> pci@[ 40000000....7fffefff] > memc1-a@[ 40000000....7fffefff] <=> pci@[ 80000000....bfffefff] > memc1-b@[300000000...33fffefff] <=> pci@[ c0000000....ffffefff] > memc2-a@[ 80000000....bfffefff] <=> pci@[100000000...13fffefff] > memc2-b@[c00000000...c3fffffff] <=> pci@[140000000...17fffffff] > > This leaves a one-page gap between phsyical memory regions which would > normally be contiguous. One cannot have a dma alloc that spans any two > regions. This is a drastic step, but I don't see an alternative. > Perhaps I may be missing what you are saying... Ok, IFF we are guranteed to always have a gap between physical memory locations we are fine indeed.
