On Fri, Jul 6, 2018 at 3:03 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote: > > * Dan Williams <dan.j.williams@xxxxxxxxx> wrote: > >> > config attached. > > Doh, I intended to attach the config - attached now. > >> > These numa_emulation changes are a bit of a trainwreck - I'm removing both >> > num_emulation commits from -tip for now, could you please resubmit a fixed/tested >> > combo version? >> >> So I squashed the fix and let the 0day robot chew on it all day with no reports >> as of yet. I just recompiled it here and am not seeing the link failure, can you >> send me the details of the kernel config + gcc version that is failing? > > My guess: it's some weird Kconfig combination in this 32-bit config. > > Can you reproduce it with this config? Yup, got it, thanks! Turning on debuginfo I get: arch/x86/mm/numa_emulation.o: In function `split_nodes_size_interleave_uniform': arch/x86/mm/numa_emulation.c:257: undefined reference to `__udivdi3' Previously we were dividing by a power-of-2 constant MAX_NUM_NODES, and I believe in my builds the compiler was still deducing the constant from the "nr_nodes = MAX_NUM_NODES" assignment. Fix inbound, and I believe it will make it even clearer the difference between the typical split and the new uniform split capability.
