On Tue 2014-07-22 00:36:37, Joerg Roedel wrote:
> Pavel,
>
> On Mon, Jul 21, 2014 at 12:26:57PM +0200, Joerg Roedel wrote:
> > unsigned int snapshot_additional_pages(struct zone *zone)
> > {
> > + unsigned int rtree, nodes;
> > unsigned int res;
> >
> > res = DIV_ROUND_UP(zone->spanned_pages, BM_BITS_PER_BLOCK);
> > res += DIV_ROUND_UP(res * sizeof(struct bm_block),
> > LINKED_PAGE_DATA_SIZE);
> > - return 2 * res;
> > + rtree = nodes = DIV_ROUND_UP(zone->spanned_pages, BM_BITS_PER_BLOCK);
> > + rtree += DIV_ROUND_UP(rtree * sizeof(struct rtree_node),
> > + LINKED_PAGE_DATA_SIZE);
> > + while (nodes > 1) {
> > + nodes = DIV_ROUND_UP(nodes, BM_ENTRIES_PER_LEVEL);
> > + rtree += nodes;
> > + }
> > +
> > + return 2 * (res + rtree);
> > }
>
> Since you asked in another mail if I took the new data structure size
> requirements into account, here is the code I added for this
> computation.
Yep, thanks, I found it in the meantime.
Pavel
--
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