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Date: Mon, 14 Nov 2016 10:30:00 -0800 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com, akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com, josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com, luto@...capital.net Subject: [PATCH RFC tip/core/rcu 0/5] Consolidate RCU dyntick-idle counter manipulation Hello! The first four patches of this series consolidate RCU's dyntick-idle counter manipulations into a set of access functions. These are currently queued for 4.12 (merge window after next). The last patch in this series uses the bottom bit of RCU's dyntick-idle counter to track a CPU's state, and has been proposed to track the need to flush the local CPU's TLB. This last patch will not be pushed until it has a use. The patches are as follows: 1. Abstract the dynticks momentary-idle operation. 2. Abstract the dynticks snapshot operation. 3. Abstract dynticks extended quiescent state enter/exit operations. 4. Abstract extended quiescent state determination. 5. Maintain special bits at bottom of ->dynticks counter, which might be used to track a given CPU's need to flush TLBs. Thanx, Paul ------------------------------------------------------------------------ include/linux/rcutiny.h | 11 + kernel/rcu/tree.c | 263 ++++++++++++++++++++++++++++++++++------------- kernel/rcu/tree.h | 3 kernel/rcu/tree_exp.h | 12 -- kernel/rcu/tree_plugin.h | 2 kernel/rcu/tree_trace.c | 2 6 files changed, 216 insertions(+), 77 deletions(-)
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