On Thu, Feb 25, 2016 at 7:26 PM, David Daney <ddaney@xxxxxxxxxxxxxxxxxx> wrote: > On 02/23/2016 11:36 AM, Rob Herring wrote: >> >> On Fri, Feb 19, 2016 at 05:13:17PM -0800, David Daney wrote: >>> >>> From: Ganapatrao Kulkarni <gkulkarni@xxxxxxxxxxxxxxxxxx> >>> >>> ADD device tree node parsing for NUMA topology using device >>> "numa-node-id" property distance-map. >> >> >> I still want an adequate explanation why NUMA setup cannot be done with >> an unflattened tree. PowerPC manages to do that and should have a >> similar init flow being memblock based, so I would expect arm64 can too. > > > Many things could be done. Really, we want to know what *should* be done. > > In the context of the current arm64 memory initialization we (more or less) > do: > > 1) early_init_fdt_scan_reserved_mem(); > 2) memory_present() > 3) sparse_init() > 4) other things > 5) unflatten_device_tree() > > We are already reading information out of the FDT at #1. > > This patch set adds a step between 1 and 2 where we read NUMA information > out of the FDT. The dependency on unflattening is that memblock is up and we can allocate a chunk from it. Isn't that dependency met by step 1 or is there a dependency on sparsemem (or something else)? Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
