On Wed, 9 May 2007, Yasunori Goto wrote:
>
> +unsigned int nr_free_movable_pages(void)
> +{
> + unsigned long nr_pages = 0;
> + struct zone *zone;
> + int nid;
> +
> + for_each_online_node(nid) {
> + zone = &(NODE_DATA(nid)->node_zones[ZONE_MOVABLE]);
> + nr_pages += zone_page_state(zone, NR_FREE_PAGES);
> + }
> + return nr_pages;
> +}
Hmmmm... This is redoing what the vm counters already provide
Could you add
NR_MOVABLE_PAGES etc.
instead and then let the ZVC counter logic take care of the rest?
With a ZVC you will have the numbers in each zone and also in
/proc/vmstat.
(Additional ulterior motive: If we ever get away from ZONE_MOVABLE and
make movable a portion of each zone then this will still work)
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