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Date: Tue, 4 Jun 2024 15:26:46 -0700 From: "Paul E. McKenney" <paulmck@...nel.org> To: rcu@...r.kernel.org Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com, rostedt@...dmis.org Subject: [PATCH rcu 0/6] Grace-period memory-barrier adjustments for v6.11 Hello! This series removes redundant memory barriers from the grace-period code paths: 1. Remove full ordering on second EQS snapshot, courtesy of Frederic Weisbecker. 2. Remove superfluous full memory barrier upon first EQS snapshot, courtesy of Frederic Weisbecker. 3. rcu/exp: Remove superfluous full memory barrier upon first EQS snapshot, courtesy of Frederic Weisbecker. 4. Remove full memory barrier on boot time eqs sanity check, courtesy of Frederic Weisbecker. 5. Remove full memory barrier on RCU stall printout, courtesy of Frederic Weisbecker. 6. rcu/exp: Remove redundant full memory barrier at the end of GP, courtesy of Frederic Weisbecker. Thanx, Paul ------------------------------------------------------------------------ b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst | 6 +-- b/kernel/rcu/tree.c | 2 - b/kernel/rcu/tree_exp.h | 8 +++- b/kernel/rcu/tree_stall.h | 4 +- kernel/rcu/tree.c | 19 +++------- kernel/rcu/tree_exp.h | 8 +++- 6 files changed, 26 insertions(+), 21 deletions(-)
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