linux-kernel - [PATCH 0/3] rcu: synchronize_rcu[

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Date:   Mon, 14 Mar 2022 14:37:35 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     "Paul E . McKenney" <paulmck@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Marco Elver <elver@...gle.com>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Boqun Feng <boqun.feng@...il.com>,
        Uladzislau Rezki <uladzislau.rezki@...y.com>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: [PATCH 0/3] rcu: synchronize_rcu[_expedited]() related fixes


A few fixes especially for expedited GP polling causing a stall on TREE07,
as reported by Paul.

We may still want to optimize start_poll_synchronize_rcu_expedited() on
UP-no-preempt but I think Paul may be implying this while doing other
fixes.

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	rcu/dev

HEAD: 6e5fd7e614fd5c8f0fffeaa140b7ea697bfeb096

Thanks,
	Frederic
---

Frederic Weisbecker (2):
      rcu: Fix expedited GP polling against UP/no-preempt environment
      rcu: Fix preemption mode check on synchronize_rcu[_expedited]()

Valentin Schneider (1):
      preempt/dynamic: Introduce preempt mode accessors


 include/linux/sched.h | 16 +++++++++++++++
 kernel/rcu/tree.c     |  2 +-
 kernel/rcu/tree_exp.h | 57 +++++++++++++++++++++++++++++++--------------------
 kernel/sched/core.c   | 11 ++++++++++
 4 files changed, 63 insertions(+), 23 deletions(-)