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    SubjectRe: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards
    Date
    > diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
    > --- a/arch/parisc/mm/init.c
    > +++ b/arch/parisc/mm/init.c
    > @@ -266,8 +266,10 @@ static void __init setup_bootmem(void)
    > }
    > memset(pfnnid_map, 0xff, sizeof(pfnnid_map));
    >
    > - for (i = 0; i < npmem_ranges; i++)
    > + for (i = 0; i < npmem_ranges; i++) {
    > + node_set_state(i, N_NORMAL_MEMORY);
    > node_set_online(i);
    > + }
    > #endif


    I'm surprised this one. If arch code doesn't initialized N_NORMAL_MEMORY,
    (or N_HIGH_MEMORY. N_HIGH_MEMORY == N_NORMAL_MEMORY if CONFIG_HIGHMEM=n)
    kswapd is created only at node0. wow.

    The initialization must be necessary even if !NUMA, I think. ;-)
    Probably we should have revisit all arch code when commit 9422ffba4a
    (Memoryless nodes: No need for kswapd) was introduced, at least.

    Thank you David. and I'm sad this multi level unforunate mismatch....




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