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From:   Guo Ren <guoren@kernel.org>
Date:   Thu, 5 May 2022 11:30:09 +0800
Message-ID: <CAJF2gTSjwu3-SLfXAh=UrqSq28mq_7nxbFNQ9j9kqY32EiXcJw@mail.gmail.com>
Subject: Re: [PATCH v4 1/7] asm-generic: ticket-lock: New generic ticket-based spinlock
To:     =?UTF-8?Q?Heiko_St=C3=BCbner?= <heiko@sntech.de>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
        Waiman Long <longman@redhat.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        Jonas Bonn <jonas@southpole.se>,
        Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
        Stafford Horne <shorne@gmail.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Greg KH <gregkh@linuxfoundation.org>,
        sudipm.mukherjee@gmail.com, macro@orcam.me.uk, jszhang@kernel.org,
        linux-csky@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Openrisc <openrisc@lists.librecores.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        Palmer Dabbelt <palmer@rivosinc.com>
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Reviewed-by: Guo Ren <guoren@kernel.org>

On Wed, May 4, 2022 at 7:57 PM Heiko St=C3=BCbner <heiko@sntech.de> wrote:
>
> Am Samstag, 30. April 2022, 17:36:20 CEST schrieb Palmer Dabbelt:
> > From: Peter Zijlstra <peterz@infradead.org>
> >
> > This is a simple, fair spinlock.  Specifically it doesn't have all the
> > subtle memory model dependencies that qspinlock has, which makes it mor=
e
> > suitable for simple systems as it is more likely to be correct.  It is
> > implemented entirely in terms of standard atomics and thus works fine
> > without any arch-specific code.
> >
> > This replaces the existing asm-generic/spinlock.h, which just errored
> > out on SMP systems.
> >
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
>
> on riscv64+riscv32 qemu, beaglev and d1-nezha
>
> Tested-by: Heiko Stuebner <heiko@sntech.de>
>
>


--=20
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/