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    SubjectRe: [PATCH] netfilter: use per-cpu recursive lock (v10)
    Eric Dumazet writes:

    > OK, but we still have a problem on machines with >= 250 cpus,
    > because calling 250 times spin_lock() is going to overflow preempt_count,
    > as each spin_lock() increases preempt_count by one.

    Huh? Each cpu has its own separate preempt_count.


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