From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B9DE1DDA0C for ; Wed, 4 Jun 2025 16:53:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749055990; cv=none; b=GByAsmnObha8u+uoWOxgEqjUkBeE2KqxMY1pBKHy+xRJqpYlRULMf1RaWgQNK0K6lfzc3Locve5mrfIA0TexFKDmIb05x1hiiYGm9wlXia+7jXWTzczhSZQSgxR6nu/lRDS+LRZ9yEmr2V4GkaqrUf7bhYagtxldq3ba615BEVU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749055990; c=relaxed/simple; bh=Y6psz76j6Q54BLu/dla5y9lVeHPkpDqvYnlf52GvYWU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=bKdzPl/NAqpsI3nJiQIGU6DfuOgIvf3KII9XXnQ4eY8VwXq0ej4H+9igr8SYqt78mZ6DTLpXAG/kr/e8ooqN64Fjce51yzJKCU/Z3xelLSzTYMk5spiJCJvSxAcBFnxvqli1vGbu8QWc8G5lu58f4gnu1b5B8d94+g5AoYtGmnY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=dvgBp8vC; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="dvgBp8vC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1749055987; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Y6psz76j6Q54BLu/dla5y9lVeHPkpDqvYnlf52GvYWU=; b=dvgBp8vC/q8thG/Z5+iTVw4PwPwI6svJq+U/Cc2do8UgvUl57QswQvHC29L8VJnrNlNpSP XLAKWHRK+AzJKQXv2zZ5QsBPAuFnblZTFMzbDJ9UbhNOP6pn26Nsl4HKwx2nwg+y0Ctgil 3RPPY/t+Py+f72Xk88p45eYRJxU6iI4= Received: from mail-lj1-f198.google.com (mail-lj1-f198.google.com [209.85.208.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-134-bqRh_7J7NrmsoennNOtObw-1; Wed, 04 Jun 2025 12:53:06 -0400 X-MC-Unique: bqRh_7J7NrmsoennNOtObw-1 X-Mimecast-MFC-AGG-ID: bqRh_7J7NrmsoennNOtObw_1749055985 Received: by mail-lj1-f198.google.com with SMTP id 38308e7fff4ca-32a64f93c68so831851fa.0 for ; Wed, 04 Jun 2025 09:53:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749055985; x=1749660785; h=content-transfer-encoding:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Y6psz76j6Q54BLu/dla5y9lVeHPkpDqvYnlf52GvYWU=; b=VRu3C3oqvBwmLaNjpLQCpJaPD/i1sd/HOSC3BcL/7OlQOZPJF1EPS0MkrnIAuGB0o/ 09Vz4YbD1TYKrS91eFagDvx8x88OcPzOG4+QzmXeEvGDX2xOz/t9WsOcjBrqlPPV8htN 6uK1tIcNhRrKnsm00nDdKBlGjKSkvt4p9aFuddW5WvYmCnHurTyS5X6M5MynF5hsbYcw HKds2R5SEDqhNuei0CJV2j03G7Xhx3cezbq6+LBH5QtBtaOwINZBP6Y+xrAgeXPQQWm3 yjk6rlPoDot8OSCJDp2JeaSlg6P3F88WwLFdI2Of3Tj0MJnSJ+6aW9Avh3RUd8oRcXVD BTPg== X-Forwarded-Encrypted: i=1; AJvYcCV8OKV24j5ajSGeS+Wdn+UBzCbMOl/DUWnkF9gKV8cVjr98F2xvHWUYNGkg1qqIceW0utwIG7VxFSGB@vger.kernel.org X-Gm-Message-State: AOJu0Ywk4GhjXKgkZxKPvpbJbmTfe1ZPqpTWSVf5DbiNMXHxRbklYs4z xrLDh6CojWQMkOrUhlPOcO2V5TAsQDPydo0TpUPlic8aE9J3sUO3/f+oZaM+tAhztwrx3ShrtuP ASzmaSHlxzsM3PVWZAY+y7VAtu/v8mLNgrYdzE1ZiEikWiiBLywCv53nqpDxKRho= X-Gm-Gg: ASbGncvJu8HPnKrZ6VClMR3DW0NMGKCGOX5b7hMwTgDf7w4r7Sko2+xi5C13N0froZd sf64SVucHcjZIZYNx7LIPMnurDw7CvAfyd9C8Pj0bUImCprDVHMBbMT8P/xBsStyrIFXuaXWBD3 LxYzCz+bO7BWHW+/jKCSqFq9Y8x9r3OgHfjBVuGEUilWTCwze5dWVIzQPiv2XR2uqT5DXRljFNU BiWYBg/fF2ouFlHFUNvbTh7W8UJjkVYxadBPXHLrkO3xu1bNMKJj9Pp3Nmg8wXfHtHNHpyw/MLa bTkm0LoNdeQBJVsg9UjrsYWeBYtfqWAbvxDZhJOgtjiQ77I= X-Received: by 2002:a05:651c:1508:b0:309:20da:6188 with SMTP id 38308e7fff4ca-32ad11be38amr1206461fa.6.1749055984829; Wed, 04 Jun 2025 09:53:04 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFOVkK8aXlCZgkjT/0iG8wOa9KpXdYeRE73KlsXw6lWnYujNdB6WOp6huRvzJhw27fbEzbHrw== X-Received: by 2002:a05:651c:1508:b0:309:20da:6188 with SMTP id 38308e7fff4ca-32ad11be38amr1206111fa.6.1749055984366; Wed, 04 Jun 2025 09:53:04 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([45.145.92.2]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-32a85b527e1sm22753181fa.47.2025.06.04.09.53.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Jun 2025 09:53:03 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id B3D351AA9156; Wed, 04 Jun 2025 18:53:02 +0200 (CEST) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= 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, asml.silence@gmail.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 Subject: Re: [RFC v4 01/18] netmem: introduce struct netmem_desc mirroring struct page In-Reply-To: <20250604025246.61616-2-byungchul@sk.com> References: <20250604025246.61616-1-byungchul@sk.com> <20250604025246.61616-2-byungchul@sk.com> X-Clacks-Overhead: GNU Terry Pratchett Date: Wed, 04 Jun 2025 18:53:02 +0200 Message-ID: <877c1rwis1.fsf@toke.dk> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Byungchul Park writes: > 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. > > Signed-off-by: Byungchul Park Reviewed-by: Toke H=C3=B8iland-J=C3=B8rgensen