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    SubjectRe: [RFC, PATCH] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
    On Fri, Jun 8, 2012 at 3:00 PM, Kirill A. Shutemov
    <> wrote:
    > IIUC, moving rcu_barrier() up should help, but I can't say that I fully
    > understand SLAB_DESTROY_BY_RCU semantics.

    .. hmm. I think you may be right. Even if we do move it up, we
    probably shouldn't use it.

    We don't even want SLAB_DESTROY_BY_RCU, since we do the delayed RCU
    free for other reasons anyway, so it would duplicate the RCU delaying
    and cause problems. I forgot about that little complication.

    We could have a separate "RCU_BARRIER_ON_DESTROY" thing, but that's
    just silly too.

    Maybe your patch is the right thing.


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