linux-kernel - [PATCH RT v2 0/3] RCU fixes

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Message-Id: <20190821231906.4224-1-swood@redhat.com>
Date:   Wed, 21 Aug 2019 18:19:03 -0500
From:   Scott Wood <swood@...hat.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Paul E . McKenney" <paulmck@...ux.ibm.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>
Subject: [PATCH RT v2 0/3] RCU fixes

This is a respin of the "Address rcutorture issues" patchset,
minus the actual rcutorture changes.

I still plan to implement detection of bad nesting scenarios, but it's
complicated by the need to distinguish (on a non-RT kernel) between
irq/preempt disabling that would and would not happen on an RT kernel
(which would also have the benefit of being able to detect nesting
regular spinlocks inside raw spinlocks on a non-RT debug kernel).  In
the meantime I could send the rcutorture changes as a PREEMPT_RT only
patch, though the extent of the changes depends on whether my migrate
disable patchset is applied since it removes a restriction.

Scott Wood (3):
  rcu: Acquire RCU lock when disabling BHs
  sched: migrate_enable: Use sleeping_lock to indicate involuntary sleep
  rcu: Disable use_softirq on PREEMPT_RT

 include/linux/rcupdate.h |  4 ++++
 include/linux/sched.h    |  4 ++--
 kernel/rcu/tree.c        |  9 ++++++++-
 kernel/rcu/tree_plugin.h |  2 +-
 kernel/rcu/update.c      |  4 ++++
 kernel/sched/core.c      |  8 ++++++++
 kernel/softirq.c         | 12 +++++++++---
 7 files changed, 36 insertions(+), 7 deletions(-)

-- 
1.8.3.1