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    SubjectRe: [PATCH 2/3] make new alloc_pages_exact()
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    On Tue, 2011-04-12 at 12:28 +0200, Michal Nazarewicz wrote:
    > > Dave Hansen <dave@linux.vnet.ibm.com> wrote:
    > >> +void __free_pages_exact(struct page *page, size_t nr_pages)
    > >> +{
    > >> + struct page *end = page + nr_pages;
    > >> +
    > >> + while (page < end) {
    > >> + __free_page(page);
    > >> + page++;
    > >> + }
    > >> +}
    > >> +EXPORT_SYMBOL(__free_pages_exact);
    >
    > On Tue, 12 Apr 2011 00:22:23 +0200, Andrew Morton wrote:
    > > Really, this function duplicates release_pages().
    >
    > It requires an array of pointers to pages which is not great though if one
    > just wants to free a contiguous sequence of pages.

    Actually, the various mem_map[]s _are_ arrays, at least up to
    MAX_ORDER_NR_PAGES at a time. We can use that property here.

    -- Dave



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