From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, rcu@vger.kernel.org,
linux-rt-users@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
"Paul E. McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Josh Triplett <josh@joshtriplett.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Davidlohr Bueso <dave@stgolabs.net>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Joel Fernandes <joel@joelfernandes.org>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Steven Price <steven.price@arm.com>,
Ard Biesheuvel <ardb@kernel.org>
Subject: [PATCH v2 0/4] rcu, arm64: PREEMPT_RT fixlets
Date: Sat, 7 Aug 2021 01:58:03 +0100 [thread overview]
Message-ID: <20210807005807.1083943-1-valentin.schneider@arm.com> (raw)
Hi folks,
this is v2 of:
https://lore.kernel.org/lkml/20210721115118.729943-1-valentin.schneider@arm.com/
respun from Frederic and Paul's helpful feedback. Tested atop v5.14-rc4-rt6 with
the v1 patches reverted. There, commit
d76e0926d835 ("rcu/nocb: Use the rcuog CPU's ->nocb_timer")
prevents the NOCB offload warning from firing if there are no NOCB CPUs (which
is sensible). Adding a single NOCB CPU brings the warning back, which patch 3
fixes.
Note that patches 2 & 4 are already in v5.14-rc4-rt6, but still apply against
mainline.
Revisions
=========
v1 -> v2
++++++++
o Rebased and tested against v5.14-rc4-rt6
o Picked rcutorture patch from
https://lore.kernel.org/lkml/20210803225437.3612591-2-valentin.schneider@arm.com/
o Added a local_lock to protect NOCB offload state under PREEMPT_RT (Frederic,
Paul)
Valentin Schneider (4):
rcutorture: Don't disable softirqs with preemption disabled when
PREEMPT_RT
sched: Introduce is_pcpu_safe()
rcu/nocb: Protect NOCB state via local_lock() under PREEMPT_RT
arm64: mm: Make arch_faults_on_old_pte() check for migratability
arch/arm64/include/asm/pgtable.h | 2 +-
include/linux/sched.h | 10 ++++
kernel/rcu/rcutorture.c | 2 +
kernel/rcu/tree.c | 4 ++
kernel/rcu/tree.h | 4 ++
kernel/rcu/tree_plugin.h | 82 ++++++++++++++++++++++++++++----
6 files changed, 94 insertions(+), 10 deletions(-)
--
2.25.1
next reply other threads:[~2021-08-07 0:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-07 0:58 Valentin Schneider [this message]
2021-08-07 0:58 ` [PATCH v2 1/4] rcutorture: Don't disable softirqs with preemption disabled when PREEMPT_RT Valentin Schneider
2021-08-07 0:58 ` [PATCH v2 2/4] sched: Introduce is_pcpu_safe() Valentin Schneider
2021-08-07 1:42 ` Mike Galbraith
2021-08-08 16:15 ` Valentin Schneider
2021-08-10 12:49 ` Boqun Feng
2021-08-10 13:04 ` Valentin Schneider
2021-08-10 2:42 ` Boqun Feng
2021-08-10 9:26 ` Valentin Schneider
2021-08-07 0:58 ` [PATCH v2 3/4] rcu/nocb: Protect NOCB state via local_lock() under PREEMPT_RT Valentin Schneider
2021-08-07 0:58 ` [PATCH v2 4/4] arm64: mm: Make arch_faults_on_old_pte() check for migratability Valentin Schneider
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