Merge branch 'rcu/urgent' of...
Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull RCU updates from Paul E. McKenney: "This series greatly reduces the performance degradation of Tree SRCU on a CPU-hotplug stress test. The effect was not subtle: Mike Galbraith measured Classic SRCU at 55 seconds and Tree SRCU at more than 16 -minutes- for this test. Mike collected ftrace data that showed that Classic SRCU was auto-expediting invocations of synchronize_srcu() that found SRCU completely idle. This series therefore adds this auto-expedite capability to Tree SRCU, bringing the performance shortfall to less than ten seconds, which is a great improvement over the initial shortfall of 15 minutes." Signed-off-by:Ingo Molnar <mingo@kernel.org>
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