Received-SPF: pass (google.com: domain of linux-kernel+bounces-207571-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Message-ID: <45803740-442c-4298-b47e-2d87ae5a6012@davidwei.uk>
Date: Sun, 9 Jun 2024 17:37:33 -0700
Precedence: bulk
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
Content-Language: en-GB
To: Jason Gunthorpe <jgg@ziepe.ca>, David Ahern <dsahern@kernel.org>
Cc: Pavel Begunkov <asml.silence@gmail.com>,
 Mina Almasry <almasrymina@google.com>, Christoph Hellwig
 <hch@infradead.org>, 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" <davem@davemloft.net>,
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,
 Paolo Abeni <pabeni@redhat.com>, Donald Hunter <donald.hunter@gmail.com>,
 Jonathan Corbet <corbet@lwn.net>,
 Richard Henderson <richard.henderson@linaro.org>,
 Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Matt Turner
 <mattst88@gmail.com>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
 "James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
 Helge Deller <deller@gmx.de>, Andreas Larsson <andreas@gaisler.com>,
 Jesper Dangaard Brouer <hawk@kernel.org>,
 Ilias Apalodimas <ilias.apalodimas@linaro.org>,
 Steven Rostedt <rostedt@goodmis.org>, Masami Hiramatsu
 <mhiramat@kernel.org>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
 Arnd Bergmann <arnd@arndb.de>, Alexei Starovoitov <ast@kernel.org>,
 Daniel Borkmann <daniel@iogearbox.net>, Andrii Nakryiko <andrii@kernel.org>,
 Martin KaFai Lau <martin.lau@linux.dev>, Eduard Zingerman
 <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
 Yonghong Song <yonghong.song@linux.dev>,
 John Fastabend <john.fastabend@gmail.com>, KP Singh <kpsingh@kernel.org>,
 Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
 Jiri Olsa <jolsa@kernel.org>, Steffen Klassert
 <steffen.klassert@secunet.com>, Herbert Xu <herbert@gondor.apana.org.au>,
 Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
 Shuah Khan <shuah@kernel.org>, Sumit Semwal <sumit.semwal@linaro.org>,
 =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>,
 Yunsheng Lin <linyunsheng@huawei.com>, Shailend Chand <shailend@google.com>,
 Harshitha Ramamurthy <hramamurthy@google.com>,
 Shakeel Butt <shakeel.butt@linux.dev>, Jeroen de Borst
 <jeroendb@google.com>, Praveen Kaligineedi <pkaligineedi@google.com>
References: <20240530201616.1316526-1-almasrymina@google.com>
 <20240530201616.1316526-3-almasrymina@google.com>
 <ZlqzER_ufrhlB28v@infradead.org>
 <CAHS8izMU_nMEr04J9kXiX6rJqK4nQKA+W-enKLhNxvK7=H2pgA@mail.gmail.com>
 <5aee4bba-ca65-443c-bd78-e5599b814a13@gmail.com>
 <CAHS8izNmT_NzgCu1pY1RKgJh+kP2rCL_90Gqau2Pkd3-48Q1_w@mail.gmail.com>
 <eb237e6e-3626-4435-8af5-11ed3931b0ac@gmail.com>
 <be2d140f-db0f-4d15-967c-972ea6586b5c@kernel.org>
 <20240607145247.GG791043@ziepe.ca>
From: David Wei <dw@davidwei.uk>
In-Reply-To: <20240607145247.GG791043@ziepe.ca>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

On 2024-06-07 17:52, Jason Gunthorpe wrote:
> IMHO it seems to compose poorly if you can only use the io_uring
> lifecycle model with io_uring registered memory, and not with DMABUF
> memory registered through Mina's mechanism.

By this, do you mean io_uring must be exclusively used to use this
feature?

And you'd rather see the two decoupled, so userspace can register w/ say
dmabuf then pass it to io_uring?

> 
> Jason