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    SubjectRe: [PATCH 2/4] slub,rcu: don't assume the size of struct rcu_head
    On Tue, 1 Mar 2011, Lai Jiangshan wrote:

    > - * RCU free overloads the RCU head over the LRU
    > - */
    > - struct rcu_head *head = (void *)&page->lru;
    > + struct rcu_head *head;
    > +
    > + if (need_reserve_slab_rcu) {
    > + int order = compound_order(page);
    > + int offset = (PAGE_SIZE << order) - s->reserved;
    > +
    > + BUG_ON(s->reserved != sizeof(*head));

    VM_BUG_ON is sufficient here I think.

    Otherwise

    Acked-by: Christoph Lameter <cl@linux.com>



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