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Message-ID: <20200313024007.GA27492@paulmck-ThinkPad-P72>
Date: Thu, 12 Mar 2020 19:40:07 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...com, 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,
fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org
Subject: [PATCH RFC tip/core/rcu 0/2] Fix RCU idle-exit problem and comment
Hello!
This series fixes a brown-paper-bag NMI self-deadlock bug located by
Thomas Gleixner and adds comments:
1. Don't acquire lock in NMI handler in rcu_nmi_enter_common().
2. Add comments marking transitions between RCU watching and not.
These pass light rcutorture testing, and seem like v5.8 material.
Thanx, Paul
------------------------------------------------------------------------
tree.c | 31 ++++++++++++++++++++++++++-----
1 file changed, 26 insertions(+), 5 deletions(-)
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