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[2003:d8:2f4e:fd00:8e13:e3b5:90c8:1159]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-453624554cfsm77494885e9.0.2025.06.23.03.38.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Jun 2025 03:38:16 -0700 (PDT) Message-ID: <4ff361af-fd74-4d9e-b7e6-4756622109d6@redhat.com> Date: Mon, 23 Jun 2025 12:38:14 +0200 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 v6 1/9] netmem: introduce struct netmem_desc mirroring struct page To: Byungchul Park Cc: willy@infradead.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel_team@skhynix.com, kuba@kernel.org, almasrymina@google.com, ilias.apalodimas@linaro.org, harry.yoo@oracle.com, hawk@kernel.org, akpm@linux-foundation.org, davem@davemloft.net, john.fastabend@gmail.com, andrew+netdev@lunn.ch, asml.silence@gmail.com, toke@redhat.com, tariqt@nvidia.com, edumazet@google.com, pabeni@redhat.com, saeedm@nvidia.com, leon@kernel.org, ast@kernel.org, daniel@iogearbox.net, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, horms@kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, vishal.moola@gmail.com, hannes@cmpxchg.org, ziy@nvidia.com, jackmanb@google.com References: <20250620041224.46646-1-byungchul@sk.com> <20250620041224.46646-2-byungchul@sk.com> <8eaf52bf-4c3c-4007-afe5-a22da9f228f9@redhat.com> <20250623102821.GC3199@system.software.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 23.06.25 12:28, Byungchul Park wrote: > On Mon, Jun 23, 2025 at 11:32:16AM +0200, David Hildenbrand wrote: >> On 20.06.25 06:12, Byungchul Park wrote: >>> To simplify struct page, the page pool members of struct page should be >>> moved to other, allowing these members to be removed from struct page. >>> >>> Introduce a network memory descriptor to store the members, struct >>> netmem_desc, and make it union'ed with the existing fields in struct >>> net_iov, allowing to organize the fields of struct net_iov. >> >> It would be great adding some result from the previous discussions in >> here, such as that the layout of "struct net_iov" can be changed because >> it is not a "struct page" overlay, what the next steps based on this > > I think the network folks already know how to use and interpret their > data struct, struct net_iov for sure.. but I will add the comment if it > you think is needed. Thanks for the comment. Well, you CC MM folks like me ... :) -- Cheers, David / dhildenb