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    Subject[PATCH 03/10] mm: tag reseve pages
    Tag pages allocated from the reserves with a non-zero page->reserve.

    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
    ---
    include/linux/mm_types.h | 1 +
    mm/page_alloc.c | 4 +++-
    2 files changed, 4 insertions(+), 1 deletion(-)

    Index: linux-2.6-2/include/linux/mm_types.h
    ===================================================================
    --- linux-2.6-2.orig/include/linux/mm_types.h
    +++ linux-2.6-2/include/linux/mm_types.h
    @@ -60,6 +60,7 @@ struct page {
    union {
    pgoff_t index; /* Our offset within mapping. */
    void *freelist; /* SLUB: freelist req. slab lock */
    + int reserve; /* page_alloc: page is a reserve page */
    };
    struct list_head lru; /* Pageout list, eg. active_list
    * protected by zone->lru_lock !
    Index: linux-2.6-2/mm/page_alloc.c
    ===================================================================
    --- linux-2.6-2.orig/mm/page_alloc.c
    +++ linux-2.6-2/mm/page_alloc.c
    @@ -1186,8 +1186,10 @@ zonelist_scan:
    }

    page = buffered_rmqueue(zonelist, zone, order, gfp_mask);
    - if (page)
    + if (page) {
    + page->reserve = (alloc_flags & ALLOC_NO_WATERMARKS);
    break;
    + }
    this_zone_full:
    if (NUMA_BUILD)
    zlc_mark_zone_full(zonelist, z);
    --

    -
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