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Tue, 03 Nov 2026 14:43:36 -0800 (PST) Received: from localhost ([2a03:2880:9ff:64::]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36ca39b8eb3sm1372736eec.27.2026.11.03.14.43.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2026 14:43:36 -0800 (PST) Date: Tue, 3 Nov 2026 14:42:13 -0800 From: Stanislav Fomichev To: Mina Almasry Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jakub Kicinski , Willem de Bruijn , Eric Dumazet , Kaiyuan Zhang , io-uring@vger.kernel.org, Stanislav Fomichev , Paolo Abeni , "David S. Miller" , Simon Horman , Pavel Begunkov , Jens Axboe , Bobby Eshleman , Daniel Borkmann , Neal Cardwell , Kuniyuki Iwashima , David Ahern , Ido Schimmel Subject: Re: [PATCH net-next v2 2/4] netmem: store memory provider private pointer directly in struct net_iov Message-ID: References: <20261102231827.4088254-1-almasrymina@google.com> <20261102231827.4088254-3-almasrymina@google.com> X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261102231827.4088254-3-almasrymina@google.com> On 11/02, Mina Almasry wrote: [..] > Resolving the memory provider instance from a struct net_iov currently > chases niov->owner (struct net_iov_area) and then dereferences the > provider-specific container struct (such as net_devmem_dmabuf_binding > or io_zcrx_area->ifq). Chasing niov->owner is true, but I don't see another dereference you're talking about? net_devmem_iov_binding does container_of to get from area to the binding (and the area is the first member of the binding, so it is a already a nop). And IIRC, iou has a similar arrangement. So I'd vote to keep things as is unless you explain what I'm missing.