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,SPF_PASS,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 F35C0C433B4 for ; Mon, 12 Apr 2021 05:54:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B024F61209 for ; Mon, 12 Apr 2021 05:54:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229676AbhDLFy3 (ORCPT ); Mon, 12 Apr 2021 01:54:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229461AbhDLFyN (ORCPT ); Mon, 12 Apr 2021 01:54:13 -0400 Received: from mail-yb1-xb2b.google.com (mail-yb1-xb2b.google.com [IPv6:2607:f8b0:4864:20::b2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ACAA5C061574 for ; Sun, 11 Apr 2021 22:53:55 -0700 (PDT) Received: by mail-yb1-xb2b.google.com with SMTP id g38so13750535ybi.12 for ; Sun, 11 Apr 2021 22:53:55 -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=ovcdU1cRGnxHBiQJvXjk0OZF64ypG2ZjxHd5P+fKhHQ=; b=mExK27/irpuQjlI1nMuYb2LWqdLd9TKRJwNaf0M8CwW28267enGfEzMX04IDELlixI oNDTI3rWInMYFhzZEK6zQjAzvkDzgfsu411uF8nEodOGRnYGoy/BroRKCFOIHkLOymMh f5uL7DTqwLnlaxevJQII/p8iw63HBTh1VM1x53nVM81xlyfLqLQnX1L5YUG4wga8Krgz GA51gte/74XCKYgXPplGMez1OOfDhVCTC0/5MyNsl9QNmQmKMbv4Hy5tfqDuem11GgUu iVhxgp/+I6leByKPJ5qzAV08aSHUMIm3uEMNI2dYgYL5ERfZdFtSZuY8p85LtAk6Vo1v prMg== 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=ovcdU1cRGnxHBiQJvXjk0OZF64ypG2ZjxHd5P+fKhHQ=; b=GlZ50SrF9dvxs4MHoEV+PIajK7q5SI8yP8CgbATutgNtCF8+HrjE4Krh15DSxqG6dE 2lAFBk5ZTbm+d1crmWGrImf6V9EVfzDbxSAbZvgq21U6c+SqalYEtLvJX5DHxT8wN2ud n4e1q3ksCaPE60NaE6/0uQEKlkEs/nS4mUxBMMJ5xmjsZUxY+GyZ2wUA1YIWEjIYfUcp dZ0Uh9M3paW+uixvFWKcfpXxXCB1s8fdgCHmqlElcjqcm3DJ2mEP+QMeRxjr0eMEUjCP P3DonAOq3Uu7ChsGyHnD+bVTOWp5wT29I8oj2SVTHwMzeMFWK9dfp61FtVRHGHp1zhJS EwAg== X-Gm-Message-State: AOAM533/JNXlwh+Htfe5BIeY8SFMBqLRO7DQfzdp1/QlSEntqH3/UPvz om6xYff/CNYHI/mtmjzHMSxXe0hJBGyYnxGPBuRYkQ== X-Google-Smtp-Source: ABdhPJxR28RIQsIm4NqgV0cEW+Clgm/HojoJ44KSVUWBy77y/taBT+koxfnThEFVuG6Hh/lNKM6migN0yXC3CSh6Uog= X-Received: by 2002:a25:6a88:: with SMTP id f130mr35148273ybc.234.1618206834669; Sun, 11 Apr 2021 22:53:54 -0700 (PDT) MIME-Version: 1.0 References: <20210402132602.3659282-1-eric.dumazet@gmail.com> <20210411134329.GA132317@roeck-us.net> <0f63dc52-ea72-16b6-7dcd-efb24de0c852@roeck-us.net> In-Reply-To: From: Eric Dumazet Date: Mon, 12 Apr 2021 07:53:43 +0200 Message-ID: Subject: Re: [PATCH net] virtio_net: Do not pull payload in skb->head To: Guenter Roeck Cc: Eric Dumazet , "David S . Miller" , Jakub Kicinski , netdev , Xuan Zhuo , "Michael S. Tsirkin" , Jason Wang , virtualization@lists.linux-foundation.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Mon, Apr 12, 2021 at 7:48 AM Eric Dumazet wrote: > > give a verdict. > > Please post the whole strace output. > > Thanks. Also please add -tt option to strace so that we have an idea of time delays just in case. Thanks.