Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 8 Jun 2021 07:31:26 -0700
From:   Davidlohr Bueso <dave@stgolabs.net>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Greg KH <gregkh@linuxfoundation.org>,
        Andrey Semashev <andrey.semashev@gmail.com>,
        Nicholas Piggin <npiggin@gmail.com>,
        =?utf-8?B?QW5kcsOvwr/CvQ==?= Almeida <andrealmeid@collabora.com>,
        acme@kernel.org, Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        corbet@lwn.net, Darren Hart <dvhart@infradead.org>,
        fweimer@redhat.com, joel@joelfernandes.org, kernel@collabora.com,
        krisman@collabora.com, libc-alpha@sourceware.org,
        linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, malteskarupke@fastmail.fm,
        Ingo Molnar <mingo@redhat.com>, pgriffais@valvesoftware.com,
        Peter Oskolkov <posk@posk.io>,
        Steven Rostedt <rostedt@goodmis.org>, shuah@kernel.org,
        Thomas Gleixner <tglx@linutronix.de>, z.figura12@gmail.com
Subject: Re: [PATCH v4 00/15] Add futex2 syscalls
Message-ID: <20210608143126.xd6fvtdnoq6annq7@offworld>
References: <1622799088.hsuspipe84.astroid@bobo.none>
 <fb85fb20-5421-b095-e68b-955afa105467@collabora.com>
 <1622853816.mokf23xgnt.astroid@bobo.none>
 <6d8e3bb4-0cef-b991-9a16-1f03d10f131d@gmail.com>
 <1622980258.cfsuodze38.astroid@bobo.none>
 <c6d86db8-4f63-6c57-9a67-6268da266afe@gmail.com>
 <1623114630.pc8fq7r5y9.astroid@bobo.none>
 <b3488d1b-a4ff-8791-d960-a5f7ae2ea8b3@gmail.com>
 <YL9Q2tKLZP6GKbHW@kroah.com>
 <YL9YLCY9/MkhOW7F@hirez.programming.kicks-ass.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Disposition: inline
In-Reply-To: <YL9YLCY9/MkhOW7F@hirez.programming.kicks-ass.net>
User-Agent: NeoMutt/20201120
Precedence: bulk

On Tue, 08 Jun 2021, Peter Zijlstra wrote:

>On Tue, Jun 08, 2021 at 01:13:30PM +0200, Greg KH wrote:
>> On Tue, Jun 08, 2021 at 02:03:50PM +0300, Andrey Semashev wrote:
>> So what's keeping the futex2 code from doing all that futex1 does so
>> that the futex1 code can be deleted internally?
>
>I'd much rather see it the other way around. Much of what futex2 does
>can already be done with the futex1 code-base. And then we can add
>features on top.

Yeah furthermore, how can futex2 be thought of replacing futex1 in the
future when the PI aspects haven't even been mentioned?

Thanks,
Davidlohr