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    SubjectUpd: [PATCH NG] alloc_pages_limit & pages_min
    Date
    Riel convinced be to back off a part of the patch.
    Here comes an updated one.

    --
    Roger Larsson
    Skellefteå
    Sweden

    *******************************************
    Patch prepared by: roger.larsson@norran.net
    Name of file: linux-2.4.8-pre3-pages_min-R3

    --- linux/mm/page_alloc.c.orig Thu Aug 23 19:58:55 2001
    +++ linux/mm/page_alloc.c Thu Aug 23 21:19:20 2001
    @@ -253,11 +253,26 @@

    if (z->free_pages + z->inactive_clean_pages >= water_mark) {
    struct page *page = NULL;
    - /* If possible, reclaim a page directly. */
    - if (direct_reclaim)
    +
    + /*
    + * Reclaim a page from the inactive_clean list.
    + * If needed, refill the free list up to the
    + * low water mark.
    + */
    + if (direct_reclaim) {
    page = reclaim_page(z);
    - /* If that fails, fall back to rmqueue. */
    - if (!page)
    +
    + while (page && z->free_pages < z->pages_min) {
    + __free_page(page);
    + page = reclaim_page(z);
    + }
    +
    + /* let kreclaimd handle up to pages_high */
    + }
    + /* If that fails, fall back to rmqueue, but never let
    + * free_pages go below pages_min...
    + */
    + if (!page && z->free_pages >= z->pages_min)
    page = rmqueue(z, order);
    if (page)
    return page;
    -
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