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([2620:10d:c090:500::7:4943]) by smtp.gmail.com with ESMTPSA id w7-20020a170902e88700b001dba739d15bsm11097297plg.76.2024.03.05.13.55.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 05 Mar 2024 13:55:06 -0800 (PST) Message-ID: <1b57dac2-4b04-4bec-b2d7-d0edb4fcabbc@davidwei.uk> Date: Tue, 5 Mar 2024 13:54:59 -0800 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH net-next v6 02/15] net: page_pool: create hooks for custom page providers To: 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 Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , 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 , David Ahern , Willem de Bruijn , Shuah Khan , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Pavel Begunkov , Jason Gunthorpe , Yunsheng Lin , Shailend Chand , Harshitha Ramamurthy , Shakeel Butt , Jeroen de Borst , Praveen Kaligineedi References: <20240305020153.2787423-1-almasrymina@google.com> <20240305020153.2787423-3-almasrymina@google.com> Content-Language: en-GB From: David Wei In-Reply-To: <20240305020153.2787423-3-almasrymina@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2024-03-04 18:01, Mina Almasry wrote: > +struct memory_provider_ops { > + int (*init)(struct page_pool *pool); > + void (*destroy)(struct page_pool *pool); > + struct page *(*alloc_pages)(struct page_pool *pool, gfp_t gfp); > + bool (*release_page)(struct page_pool *pool, struct page *page); For ZC Rx we added a scrub() function to memory_provider_ops that is called from page_pool_scrub(). Does TCP devmem not custom behaviour waiting for all netmem_refs to return before destroying the page pool? What happens if e.g. application crashes?