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    SubjectRe: [PATCH, RFC] v6 scalable classic RCU implementation

    * Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

    > Attached is an updated patch to Classic RCU that applies a hierarchy,
    > greatly reducing the contention on the top-level lock for large
    > machines. This passes 10-hour concurrent rcutorture and
    > online-offline testing on 128-CPU ppc64 without dynticks enabled, and
    > exposes some timekeeping bugs in presence of dynticks (exciting
    > working on a system where "sleep 1" hangs until interrupted...).

    i'm wondering about those timekeeping bugs. Do you have an idea what's
    it about and does it affect mainline?

    Ingo


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