From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id A4888A0353; Mon, 18 Nov 2019 15:04:23 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A277CB62; Mon, 18 Nov 2019 15:04:22 +0100 (CET) Received: from mail-io1-f65.google.com (mail-io1-f65.google.com [209.85.166.65]) by dpdk.org (Postfix) with ESMTP id 771F99E4 for ; Mon, 18 Nov 2019 15:04:21 +0100 (CET) Received: by mail-io1-f65.google.com with SMTP id 1so18864970iou.4 for ; Mon, 18 Nov 2019 06:04:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=iPNYlqYDeesLnz5kTkNbfrbTXBwWmlWD5FktreM64r4=; b=CQvG3YjCS1sjwehhPWXO3JMI5UBJxhiCUadnI6XeWciqK0Se7998PNtjPvCiCdB5lP UozYXzQaxBppUimIM/uI9QO+Ewa2qseZM2LwWGrO1/O/OuBEa4UFXERZ0tqxz2Oiy4HC aIJzVRP0/8lmqViDJqk7JL8djYJpnme15QkH8vKqqNwwkhAQ5q1kevGpJZf0le6GvEIF SNVd3DMLOEeuZeB/YWMZhni67vuneJWTQHc/6SUhAEscVfMZF+3JALoX3tMiNp1H0nCp XcB4uEmNYhO7CYX8yG7opE/1zve7VYbPjXj7BybEsdlokMj8TVoh9H6XqqEjCSw3IYqv bihQ== 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=iPNYlqYDeesLnz5kTkNbfrbTXBwWmlWD5FktreM64r4=; b=Ec8aX+dCGDmHdsD05LvpWFZ2t4TmXG0qWGS9WJ1D2v82f6ftlkIT2pGSTUaGQfdQJk hBUCIdfYDeeVwgKh/7knNxOPNebTfwN0TFFhCk+cxLx3EP1lDXjKHwwgVdJWAoYXRqoc hNPjfmvHVjfxKxBhcmmrq8u+MfQhVdA5kEyyxks9L5qxmn1kXpxpEXBDUjCrGheE79ys jHUu1c4qSlsjwtPxzfmgV9b5R02mM3Ed7NELuAiijuY0TOqCt33Fi/Am7Vhgm4e8UK+D GL2ZufDgYYkqJVMlPLz7CzGBkmys/hcEak2wKQgTDFDr132P30D5EuplhOLvJrbMMjTN 4+SA== X-Gm-Message-State: APjAAAWgy3T0MUVi4ERn+Bndb23cFzjdUILwm8bEahn/vxFIhunoDsTz KliR1/IIgIIMNAOx4WeksfmiymMGKmBOsXroul8= X-Google-Smtp-Source: APXvYqyy/IyIuHkmsqQZBEStcVcDdqbKtB3CLqPz9stkI1eAV/NiBD2eYU1PEW/f8l/gKLHZDhCgktUyfgnuZGjze6c= X-Received: by 2002:a5d:8056:: with SMTP id b22mr5915203ior.60.1574085860511; Mon, 18 Nov 2019 06:04:20 -0800 (PST) MIME-Version: 1.0 References: <20191117151244.3854-1-david.marchand@redhat.com> <20191117151244.3854-2-david.marchand@redhat.com> In-Reply-To: <20191117151244.3854-2-david.marchand@redhat.com> From: Jerin Jacob Date: Mon, 18 Nov 2019 19:34:04 +0530 Message-ID: To: David Marchand Cc: dpdk-dev , Thomas Monjalon , Kiran Kumar K , Olivier Matz , Ferruh Yigit , Anatoly Burakov , Andrew Rybchenko , Stephen Hemminger , Vamsi Attunuru Content-Type: text/plain; charset="UTF-8" Subject: Re: [dpdk-dev] [PATCH v15 1/2] kni: support userspace VA X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Sun, Nov 17, 2019 at 8:43 PM David Marchand wrote: > > From: Vamsi Attunuru > > Patch adds support for kernel module to work in IOVA = VA mode by > providing address translation routines to convert userspace VA to > kernel VA. > > KNI performance using PA is not changed by this patch. > But comparing KNI using PA to KNI using VA, the latter will have lower > performance due to the cost of the added translation. > > This translation is implemented only with kernel versions starting 4.6.0. > > Signed-off-by: Vamsi Attunuru > Signed-off-by: Kiran Kumar K Reviewed-by: Jerin Jacob