Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards

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> 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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