linux-kernel - Re: [patch 00/50] locking, sched: The PREEMPT-RT locking infrastructure

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Message-ID: <87v94vllmr.mognet@arm.com>
Date:   Tue, 27 Jul 2021 18:19:56 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Davidlohr Bueso <dave@...olabs.net>
Subject: Re: [patch 00/50] locking, sched: The PREEMPT-RT locking infrastructure

On 13/07/21 17:10, Thomas Gleixner wrote:
> The series survived quite some internal testing in RT kernels and is part
> of the recent 5.13-rt1 release.
>
> For !RT kernels there is no functional change.
>
> The series is also available from git:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git rtmutex
>

FWIW I've had this (well 5.13-rt1 + some arm64 PREEMPT_RT fixes) running
over a variety of arm64 hardware + locktorture, and nothing has broken
yet.

Tested-by: Valentin Schneider <valentin.schneider@....com>

> Thanks,
>
>       tglx
> ---
>  a/kernel/locking/mutex-debug.h       |   29 -
>  b/include/linux/mutex.h              |  165 ++++--
>  b/include/linux/rbtree_types.h       |   34 +
>  b/include/linux/rwbase_rt.h          |   37 +
>  b/include/linux/rwlock_rt.h          |  140 +++++
>  b/include/linux/spinlock_rt.h        |  151 +++++
>  b/include/linux/spinlock_types_raw.h |   65 ++
>  b/kernel/locking/rtmutex_api.c       |  647 ++++++++++++++++++++++++
>  b/kernel/locking/rwbase_rt.c         |  263 +++++++++
>  b/kernel/locking/spinlock_rt.c       |  257 +++++++++
>  include/linux/debug_locks.h          |    3
>  include/linux/preempt.h              |    4
>  include/linux/rbtree.h               |   30 -
>  include/linux/rtmutex.h              |    4
>  include/linux/rwlock_types.h         |   39 +
>  include/linux/rwsem.h                |   58 ++
>  include/linux/sched.h                |   77 ++
>  include/linux/sched/wake_q.h         |    7
>  include/linux/spinlock.h             |   15
>  include/linux/spinlock_api_smp.h     |    3
>  include/linux/spinlock_types.h       |   45 +
>  include/linux/ww_mutex.h             |   16
>  kernel/Kconfig.locks                 |    2
>  kernel/futex.c                       |  466 ++++++++++++-----
>  kernel/locking/Makefile              |    3
>  kernel/locking/mutex-debug.c         |   25
>  kernel/locking/mutex.c               |  139 ++---
>  kernel/locking/mutex.h               |   35 +
>  kernel/locking/rtmutex.c             |  930 ++++++++++++-----------------------
>  kernel/locking/rtmutex_common.h      |  110 ++--
>  kernel/locking/rwsem.c               |  108 ++++
>  kernel/locking/spinlock.c            |    7
>  kernel/locking/spinlock_debug.c      |    5
>  kernel/sched/core.c                  |  111 +++-
>  lib/test_lockup.c                    |    8
>  35 files changed, 3031 insertions(+), 1007 deletions(-)