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    SubjectRe: [GIT PULL rcu/next] rcu commits for 2.6.40

    * Ingo Molnar <mingo@elte.hu> wrote:

    > I started bisecting this, and the two relevant endpoints:
    >
    > bad: 11c476f: net,rcu: convert call_rcu(prl_entry_destroy_rcu) to kfree
    > good: 0ee5623f: Linux 2.6.39-rc6
    >
    > very clearly indicate that this is an RCU regression.

    This might be the same one Yinghai found:

    e59fb3120bec: rcu: Decrease memory-barrier usage based on semi-formal proof

    So with the config i sent it's definitely reproducible.

    At first sight couldnt this be related not to barriers, but to not setting
    need_resched() like we did before?

    Thanks,

    Ingo


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