From: Ingo Molnar Date: Thu, 27 Apr 2017 05:41:37 +0000 (+0200) Subject: Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck... X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=96fd20cf3f1620d699db43cd08745f1e57e1072a;p=linux.git Merge branch 'rcu/urgent' of git://git./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 --- 96fd20cf3f1620d699db43cd08745f1e57e1072a