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

[Yasunori Goto <y-goto@jp.fujitsu.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?

Ummmmm.
I realized that I've forgotten many things about this patch
due to long time keeping in storage. 
At least here looks strange indeed.
I need shake my brain to recall it. :-(


-- 
Yasunori Goto 



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