From:   Thomas Gleixner <tglx@linutronix.de>
To:     Linus Torvalds <torvalds@linuxfoundation.org>
Cc:     LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        Wangyang Guo <wangyang.guo@intel.com>,
        Arjan Van De Ven <arjan.van.de.ven@intel.com>,
        Will Deacon <will@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Boqun Feng <boqun.feng@gmail.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Marc Zyngier <maz@kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org
Subject: Re: [patch 2/3] atomics: Provide rcuref - scalable reference counting
In-Reply-To: <CAHk-=wjeMbHK61Ee+Ug4w8AGHCSDx94GuLs5bPXhHNhA_+RjzA@mail.gmail.com>
References: <20230228132118.978145284@linutronix.de>
 <20230228132910.991359171@linutronix.de>
 <CAHk-=wjeMbHK61Ee+Ug4w8AGHCSDx94GuLs5bPXhHNhA_+RjzA@mail.gmail.com>
Date:   Wed, 01 Mar 2023 12:09:42 +0100
Message-ID: <87pm9slocp.ffs@tglx>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Tue, Feb 28 2023 at 16:42, Linus Torvalds wrote:
> On Tue, Feb 28, 2023 at 6:33=E2=80=AFAM Thomas Gleixner <tglx@linutronix.=
de> wrote:
> This may seem like nit-picking, but I absolutely *HATE* our current
> refcount interface for how absolutely horrid the code generation ends
> up being. It's gotten better, but it's still not great.
>
> So if we're introducing yet another refcount interface, and it's done
> in the name of efficiency, I would *really* want it to actually be
> exactly that: efficient. Not some half-way thing.
>
> And yes, that may mean that it should have some architecture-specific
> code (with fallback defaults for the generic case).

Let me stare at that some more.

Thanks,

        tglx