linux-kernel - Re: [PATCH v4 1/7] asm-generic: ticket-lock: New generic ticket-based spinlock

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Date:   Thu, 5 May 2022 11:30:09 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Heiko Stübner <heiko@...ech.de>
Cc:     Arnd Bergmann <arnd@...db.de>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Stafford Horne <shorne@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Greg KH <gregkh@...uxfoundation.org>,
        sudipm.mukherjee@...il.com, macro@...am.me.uk, jszhang@...nel.org,
        linux-csky@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Openrisc <openrisc@...ts.librecores.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Palmer Dabbelt <palmer@...osinc.com>
Subject: Re: [PATCH v4 1/7] asm-generic: ticket-lock: New generic ticket-based spinlock

Reviewed-by: Guo Ren <guoren@...nel.org>

On Wed, May 4, 2022 at 7:57 PM Heiko Stübner <heiko@...ech.de> wrote:
>
> Am Samstag, 30. April 2022, 17:36:20 CEST schrieb Palmer Dabbelt:
> > From: Peter Zijlstra <peterz@...radead.org>
> >
> > This is a simple, fair spinlock.  Specifically it doesn't have all the
> > subtle memory model dependencies that qspinlock has, which makes it more
> > 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@...radead.org>
> > Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
>
> on riscv64+riscv32 qemu, beaglev and d1-nezha
>
> Tested-by: Heiko Stuebner <heiko@...ech.de>
>
>


-- 
Best Regards
 Guo Ren

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