On Tue, 19 Feb 2019 at 16:16, Ingo Molnar <[email protected]> wrote: > > > * Linus Torvalds <[email protected]> wrote: > > > On Sun, Feb 17, 2019 at 2:59 AM Ingo Molnar <[email protected]> wrote: > > > > > > I marked it RFC: please have a second look at the mm/memblock.c change, > > > which adds a INIT_MEMBLOCK_RESERVED_REGIONS detour that ARM64 takes for > > > these systems. > > > > It's not pretty, but it looks minimal for now. Pulled. > > Thanks! > > > > Perhaps we should upgrade the build time sizing of all platforms to > > > INIT_MEMBLOCK_REGIONS+NR_CPUS+1 and thus centrally give an extra > > > allocation entry per CPU configured? > > > > > > Or is there some cleaner solution? > > > > Is there some reason other platforms might want that kind of thing? > > Not that I'm aware of. >
Nor me. > > If not, then the current hack seems sufficient. > > Ok! > Thanks. It's a bit of a hack indeed, but every other option I explored was a lot nastier. We might be able to tweak the LPI table allocation logic so that they are adjacent, taking up only a single slot in the reservation table, but that will have to wait for v5.2
