Re: [Lhms-devel] [RFC/PATCH: 002/010] Memory hotplug for new nodes with pgdat allocation. (Wait table and zonelists initalization)

[Dave Hansen <haveblue@us.ibm.com>]

On Fri, 2006-02-10 at 23:20 +0900, Yasunori Goto wrote:
> 
>  static __meminit
>  void zone_wait_table_init(struct zone *zone, unsigned long
> zone_size_pages)
>  {
> -       int i;
> +       int i, hotadd = (system_state == SYSTEM_RUNNING);
>         struct pglist_data *pgdat = zone->zone_pgdat;
> +       unsigned long allocsize;
>  
>         /*
>          * The per-page waitqueue mechanism uses hashed waitqueues
>          * per zone.
>          */
> +       if (hotadd && (zone_size_pages == PAGES_PER_SECTION))
> +               zone_size_pages = PAGES_PER_SECTION << 2; 

I don't think I understand this calculation.  You online only 4 sections
worth of pages?

-- Dave

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