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    SubjectRe: [PATCH RFC 0/7] rcu: v2 Inlinable preemptible rcu_read_lock() and rcu_read_unlock()
    On Sat, Apr 14, 2012 at 9:19 AM, Paul E. McKenney
    <paulmck@linux.vnet.ibm.com> wrote:
    >
    > This series is version two of the inlinable versions of preemptible
    > RCU's __rcu_read_lock() and __rcu_read_unlock().  The first version may
    > be found at https://lkml.org/lkml/2012/3/25/94.  The individual commits
    > in this new series are as follows:

    Ok, I'm looking at code generation changes for this now, and sadly (or
    not) all the changes to the selinux code have actually made the RCU
    overhead that made me notice this issue originally much less
    noticeable because we inline the right things etc, and that helped
    with some of the problems that the rcu callsites had.

    The fact that we don't have to indirect through "current" does seem to
    make the code much simpler, though. So hopefully the actual rcu
    unlocking code itself is better. But that was just under 1% of the
    benchmark cost, so I was hoping that the call sites would be more
    noticeable.

    I'll see if it boots and what it does to my profiles and
    microbenchmark, though.

    Linus
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