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    SubjectRe: kmemcheck caught read from freed memory (cfq_free_io_context)
    Hi Paul,

    On Wed, Apr 2, 2008 at 1:40 PM, Paul E. McKenney
    <paulmck@linux.vnet.ibm.com> wrote:
    > I am still confused.
    >
    > o The kmem_cache has SLAB_DESTROY_BY_RCU.
    >
    > o This means that a given slab should not be returned to the
    > system until a grace period elapses.

    Yeah, that's what I thought too, that this is a SLUB bug but Peter
    convinced me otherwise. SLUB keeps the _page_ around so the pointer
    will be _valid_, although it might not be _your_ pointer so the caller
    needs to do some validation step. Or at least that's how I understood
    what Peter was saying.

    Pekka


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