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([2620:10d:c092:600::1:b2ad]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-611fa28e1c4sm1806095a12.10.2025.07.12.07.38.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 12 Jul 2025 07:38:41 -0700 (PDT) Message-ID: Date: Sat, 12 Jul 2025 15:39:59 +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 v9 1/8] netmem: introduce struct netmem_desc mirroring struct page To: Byungchul Park , willy@infradead.org, netdev@vger.kernel.org Cc: 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, toke@redhat.com, tariqt@nvidia.com, edumazet@google.com, pabeni@redhat.com, saeedm@nvidia.com, leon@kernel.org, ast@kernel.org, daniel@iogearbox.net, david@redhat.com, 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: <20250710082807.27402-1-byungchul@sk.com> <20250710082807.27402-2-byungchul@sk.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <20250710082807.27402-2-byungchul@sk.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/10/25 09:28, 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. FWIW, regardless of memdesc business, I think it'd be great to have this patch, as it'll help with some of the netmem casting ugliness and shed some cycles as well. For example, we have a bunch of niov -> netmem -> niov casts in various places. -- Pavel Begunkov