Hi all, On Fri, Jul 12, 2019 at 02:12:23PM +0200, Michal Hocko wrote: > On Fri 12-07-19 10:56:47, Hoan Tran OS wrote: > [...] > > It would be good if we can enable it by-default. Otherwise, let arch > > enables it by them-self. Do you have any suggestions? > > I can hardly make any suggestions when it is not really clear _why_ you > want to remove this config option in the first place. Please explain > what motivated you to make this change. Sorry, I think this confusion might actually be my fault and Hoan has just been implementing my vague suggestion here: https://lore.kernel.org/linux-arm-kernel/20190625101245.s4vxfosoop52gl4e@willie-the-truck/ If the preference of the mm folks is to leave CONFIG_NODES_SPAN_OTHER_NODES as it is, then we can define it for arm64. I just find it a bit weird that the majority of NUMA-capable architectures have to add a symbol in the arch Kconfig file, for what appears to be a performance optimisation applicable only to ia64, mips and sh. At the very least we could make the thing selectable. Will
