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    Subject[24/36] compound pages: Use new compound vmstat functions in SLUB
    Use the new dec/inc functions to simplify SLUB's accounting
    of pages.

    Signed-off-by: Christoph Lameter <clameter@sgi.com>
    ---
    mm/slub.c | 13 ++++---------
    1 files changed, 4 insertions(+), 9 deletions(-)

    Index: linux-2.6/mm/slub.c
    ===================================================================
    --- linux-2.6.orig/mm/slub.c 2007-08-27 19:22:13.000000000 -0700
    +++ linux-2.6/mm/slub.c 2007-08-27 21:02:51.000000000 -0700
    @@ -1038,7 +1038,6 @@ static inline void kmem_cache_open_debug
    static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
    {
    struct page * page;
    - int pages = 1 << s->order;

    if (s->order)
    flags |= __GFP_COMP;
    @@ -1054,10 +1053,9 @@ static struct page *allocate_slab(struct
    if (!page)
    return NULL;

    - mod_zone_page_state(page_zone(page),
    + inc_zone_page_state(page,
    (s->flags & SLAB_RECLAIM_ACCOUNT) ?
    - NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
    - pages);
    + NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE);

    return page;
    }
    @@ -1124,8 +1122,6 @@ out:

    static void __free_slab(struct kmem_cache *s, struct page *page)
    {
    - int pages = 1 << s->order;
    -
    if (unlikely(SlabDebug(page))) {
    void *p;

    @@ -1135,10 +1131,9 @@ static void __free_slab(struct kmem_cach
    ClearSlabDebug(page);
    }

    - mod_zone_page_state(page_zone(page),
    + dec_zone_page_state(page,
    (s->flags & SLAB_RECLAIM_ACCOUNT) ?
    - NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
    - - pages);
    + NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE);

    page->mapping = NULL;
    __free_pages(page, s->order);
    --
    -
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