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    Subject[slubllv6 16/17] slub: Not necessary to check for empty slab on load_freelist
    load_freelist is now only branched to only if there are objects available.
    So no need to check the object variable for NULL.

    ---
    mm/slub.c | 5 ++---
    1 file changed, 2 insertions(+), 3 deletions(-)

    Index: linux-2.6/mm/slub.c
    ===================================================================
    --- linux-2.6.orig/mm/slub.c 2011-05-24 09:41:11.294874943 -0500
    +++ linux-2.6/mm/slub.c 2011-05-24 09:41:15.454874919 -0500
    @@ -1983,9 +1983,6 @@ static void *__slab_alloc(struct kmem_ca
    NULL, new.counters,
    "__slab_alloc"));

    -load_freelist:
    - VM_BUG_ON(!page->frozen);
    -
    if (unlikely(!object)) {
    c->page = NULL;
    stat(s, DEACTIVATE_BYPASS);
    @@ -1994,6 +1991,8 @@ load_freelist:

    stat(s, ALLOC_REFILL);

    +load_freelist:
    + VM_BUG_ON(!page->frozen);
    c->freelist = get_freepointer(s, object);
    c->tid = next_tid(c->tid);
    local_irq_restore(flags);


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