Re: [REPOST] [PATCH 1/3] Move zone_reclaim() outside of CONFIG_NUMA(v3)

[Christoph Lameter]

On Thu, 20 Jan 2011, Balbir Singh wrote:

> --- a/include/linux/swap.h
> +++ b/include/linux/swap.h
> @@ -253,11 +253,11 @@ extern int vm_swappiness;
>  extern int remove_mapping(struct address_space *mapping, struct page *page);
>  extern long vm_total_pages;
>
> +extern int sysctl_min_unmapped_ratio;
> +extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
>  #ifdef CONFIG_NUMA
>  extern int zone_reclaim_mode;
> -extern int sysctl_min_unmapped_ratio;
>  extern int sysctl_min_slab_ratio;
> -extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
>  #else
>  #define zone_reclaim_mode 0

So the end result of this patch is that zone reclaim is compiled
into vmscan.o even on !NUMA configurations but since zone_reclaim_mode ==
0 noone can ever call that code?

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