From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f170.google.com (mail-we0-f170.google.com [74.125.82.170]) by dpdk.org (Postfix) with ESMTP id 09DB3B112 for ; Thu, 12 Jun 2014 07:32:58 +0200 (CEST) Received: by mail-we0-f170.google.com with SMTP id w61so685089wes.1 for ; Wed, 11 Jun 2014 22:33:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=kdplof3tPeKvtQmPMxyqLUiumPP1efA3HjLdJiHFMVY=; b=TK3RBuvfTgdsT21oVz1XAvInaqwjhTOY/xV64bKs4TXSk9VW2/0f9KB4of3NTJzZy8 Uzr29swx8t91Hv4+glUk5Hc2Sj9JAOHyLjJpuP6T4EdcXiFVqKzZC3At+Opixa0vhnui cd7ufAmBM22MRZZWbkR8G1Tr0yX9qMKcHSdxVQsqb0O+HUyuBnHDWiUZS599WRn02qze rCHODigJx9XOr4LNnBlksVkvXk44WeOU3VTKdOa/trkfDpS/1CJ9+4kx7RjoNnGxDzeq NSoCMBm6H+RcwuR/UjvTLZGQrDu3ClvWrrjHxUeJYM2mzRVZcjUTJmR6qjthWmw1tiqI p8uQ== MIME-Version: 1.0 X-Received: by 10.180.13.139 with SMTP id h11mr2961068wic.34.1402551193636; Wed, 11 Jun 2014 22:33:13 -0700 (PDT) Received: by 10.216.84.197 with HTTP; Wed, 11 Jun 2014 22:33:13 -0700 (PDT) Date: Thu, 12 Jun 2014 11:03:13 +0530 Message-ID: From: Vivek Soni To: dev@dpdk.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-dev] tailroom in rte_mbuf X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Jun 2014 05:32:59 -0000 Hello, My application requires to reserve some tailroom in the packet mbuf after the packet payload. I see that in the default configuration the packet mbuf reserves only the headroom. When I send larger packets, the payload is copied until the last byte of the packet mbuf before going to next mbuf. I know I can do it by modifying the rte_pktmbuf_init and keep some tailroom for myself. But is there a parameter already available in DPDK which allows me to do this. Do we need a patch for this ? Regards, Vivek Soni