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Fri, 07 Jun 2024 06:45:53 -0700 (PDT) Received: from [192.168.42.51] ([163.114.131.193]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-57aae1412absm2766177a12.57.2024.06.07.06.45.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 07 Jun 2024 06:45:53 -0700 (PDT) Message-ID: Date: Fri, 7 Jun 2024 14:45:55 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v10 02/14] net: page_pool: create hooks for custom page providers To: Christoph Hellwig Cc: Mina Almasry , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-arch@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Jonathan Corbet , Richard Henderson , Ivan Kokshaysky , Matt Turner , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Andreas Larsson , Jesper Dangaard Brouer , Ilias Apalodimas , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Steffen Klassert , Herbert Xu , David Ahern , Willem de Bruijn , Shuah Khan , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , David Wei , Jason Gunthorpe , Yunsheng Lin , Shailend Chand , Harshitha Ramamurthy , Shakeel Butt , Jeroen de Borst , Praveen Kaligineedi References: <20240530201616.1316526-1-almasrymina@google.com> <20240530201616.1316526-3-almasrymina@google.com> <5aee4bba-ca65-443c-bd78-e5599b814a13@gmail.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/5/24 09:24, Christoph Hellwig wrote: > On Mon, Jun 03, 2024 at 03:52:32PM +0100, Pavel Begunkov wrote: >> The question for Christoph is what exactly is the objection here? Why we >> would not be using well defined ops when we know there will be more >> users? > > The point is that there should be no more users. If you need another Does that "No more" stops after devmem tcp? Or after io_uring proposal? For the latter I explained why io_uring has to do it for good design and that's it's not even related to the memory type used. > case you are doing something very wrong. That's not a very illuminating answer -- Pavel Begunkov