From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67C6FC433B4 for ; Wed, 14 Apr 2021 20:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D5DA611CC for ; Wed, 14 Apr 2021 20:52:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232891AbhDNUwf (ORCPT ); Wed, 14 Apr 2021 16:52:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33532 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231329AbhDNUwf (ORCPT ); Wed, 14 Apr 2021 16:52:35 -0400 Received: from mail-yb1-xb30.google.com (mail-yb1-xb30.google.com [IPv6:2607:f8b0:4864:20::b30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A9FDAC06175F for ; Wed, 14 Apr 2021 13:52:11 -0700 (PDT) Received: by mail-yb1-xb30.google.com with SMTP id k73so17376347ybf.3 for ; Wed, 14 Apr 2021 13:52:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qMc1dVoRXovpTYQV/nXgGHQYIIUU1MZrniZIcaPAzYI=; b=jZ63PQvS0OSJEWxuC8eQL+mgIeY3zye5GVk1y4o1Jz5FWVvQk/PfIiL7GTYhxNoeq0 rGznM1hJWUQXA6P+waeuHPSY/DJs03JNq0uVwSWPnPsBzxVjgnn6TMUzGdV111v1vp2Q /nX5IfLwP9juprGuNEOuTT07JchH9A7AGMglO6Rb+9+c7hhfVbUxRh2zz0sBnmQacfBf EWnX8k44LFD6bjU3kBqM3T1EuffW2JooY05UpEBA0BKMVo1IB4OZNKKbX1gUPW2isFLB R4bgmou+/6jqYIgPw+6DqLVgue9r1GJfCIJRUL/HusGRiJ45hR+a3JnPDjJrbBlQveOp CdDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=qMc1dVoRXovpTYQV/nXgGHQYIIUU1MZrniZIcaPAzYI=; b=gZ3wAx0YoiynLvHVZgKG/EJYElg5zXh9VwFflFFhuqDhvvL4DjcFAal/49nueU7qLB maj6dL0w+zvxtUwhUM7yLyYzZ86KKaHwioORGqwr61pwksZ/r/VDhPwNDkaVfFJtu/0O dQSjVsYmcAeP6xeZqzudk4Xt/amRfkiGDc9V+lbjMLyy9U8dij+M7mMjYkAFaTe+GPCZ awLxQwGgIGjCj8T3cOBMFcspWkQWPrMNebjKhyDiUTdKhXdlBUTjZ9kP/rjTZZzLX1K8 /g9prQKmbAEKzYQCFjCSsg5Ejf+hLHr+qbLOpo4oF558TsseK1dwgK68NnAoLwJAC9KV D79w== X-Gm-Message-State: AOAM531QZ+OcKnl4eMSUh7e0H/ZR4rs7nqe9qt6riXQYGz+JhCKCrspQ WokMIoUiKxHvpMbiNGpXpU6fBWaKUHxMrfZcY7oIVQ== X-Google-Smtp-Source: ABdhPJyqMKv7jKazLHNQr9xfoSHuUWvXv3SH59PCH1Ndn1yE1hoJqvYOK5wZMT0jkn32p4YGeb+4ZAvFlg7cBrY5JE0= X-Received: by 2002:a25:850b:: with SMTP id w11mr55634403ybk.518.1618433530591; Wed, 14 Apr 2021 13:52:10 -0700 (PDT) MIME-Version: 1.0 References: <20210409223801.104657-1-mcroce@linux.microsoft.com> <20210409223801.104657-3-mcroce@linux.microsoft.com> <20210410154824.GZ2531743@casper.infradead.org> <20210414214132.74f721dd@carbon> In-Reply-To: From: Eric Dumazet Date: Wed, 14 Apr 2021 22:51:59 +0200 Message-ID: Subject: Re: [PATCH net-next v3 2/5] mm: add a signature in struct page To: Shakeel Butt Cc: Jesper Dangaard Brouer , Ilias Apalodimas , Matthew Wilcox , Matteo Croce , netdev , Linux MM , Ayush Sawal , Vinay Kumar Yadav , Rohit Maheshwari , "David S. Miller" , Jakub Kicinski , Thomas Petazzoni , Marcin Wojtas , Russell King , Mirko Lindner , Stephen Hemminger , Tariq Toukan , Jesper Dangaard Brouer , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Boris Pismenny , Arnd Bergmann , Andrew Morton , "Peter Zijlstra (Intel)" , Vlastimil Babka , Yu Zhao , Will Deacon , Michel Lespinasse , Fenghua Yu , Roman Gushchin , Hugh Dickins , Peter Xu , Jason Gunthorpe , Guoqing Jiang , Jonathan Lemon , Alexander Lobakin , Cong Wang , wenxu , Kevin Hao , Aleksandr Nogikh , Jakub Sitnicki , Marco Elver , Willem de Bruijn , Miaohe Lin , Yunsheng Lin , Guillaume Nault , LKML , linux-rdma , bpf , David Ahern , Lorenzo Bianconi , Saeed Mahameed , Andrew Lunn , Paolo Abeni Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Wed, Apr 14, 2021 at 10:09 PM Shakeel Butt wrote: > > I will let TCP RX zerocopy experts respond to this but from my high > level code inspection, I didn't see page->private usage. Indeed, we do not use page->private, since we do not own the page(s).