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 CB5DCA0350; Mon, 18 Nov 2019 17:12:09 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C4323B62; Mon, 18 Nov 2019 17:12:08 +0100 (CET) Received: from mail-pf1-f193.google.com (mail-pf1-f193.google.com [209.85.210.193]) by dpdk.org (Postfix) with ESMTP id 4803FA3 for ; Mon, 18 Nov 2019 17:12:07 +0100 (CET) Received: by mail-pf1-f193.google.com with SMTP id x28so10612381pfo.6 for ; Mon, 18 Nov 2019 08:12:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JEPWVJpLsJPCkkZQAy+JJV2fq9t+M+k5zucfUdh27XI=; b=fuYk7y+F5+CJrMrFH+TJnySiU99q5b0tlodKygqG6TSm0uQsUw5dIZvna8w5Z8dsnu z5oTvEek2UZoI/cvm7Xujs/EVYK/tadfX+KobUKTLom4t4YLG3ujIBicLNW71BTJXh2a MZbZQpDMnTNxH3laRsv9E5Zd/agB0pSZ+NZLun7bLjtX2hy1hQ1wTBhQ0lb76AjqGvGx dGXWo/n1Q2lRQmTUmoVzaGrVZqvZSHosi0idH73ECDj7dpHDoeEmXzcQvoNiyfYoRMyR Fx3Qf4WBMfdvkY5zSGbiSaKMBks4SCqRNzUnjOyQt5sSS4SP72tp4/q+Tr6XuuJBBmN8 +t7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JEPWVJpLsJPCkkZQAy+JJV2fq9t+M+k5zucfUdh27XI=; b=lkNKwYNVWkPQMRgawwhJkyUCAyWXKjp+KKy/E3LYyAjdn2rNFd6nyndmWjlW9kmeTb YCCau54jDq7aG1sItjD/a0X3t2kBnrcU8pgqCDrp4BnOhnX7mOWBjlLNBTIaJNDfqa6z 3VJPGPfoHgYnj3XXThYDeW0Qk5hG4jz4+GdxlLXRw5VcZclPTLlV0Dolp1vcF5WG9Fz6 XMshf2Rm4j/okPDeKhtMz1Ewj7ueaOnTYUB2zIDZ3ZnoBa7kNUD9NnoOJDcsu1UotAqH lyE2h34caYoex3C0hVyddBfenTHZhFbGI+NvdUohwgAjEAKgMA0UCHvK0qbRXMdIDS+9 FZPg== X-Gm-Message-State: APjAAAWJRzjRSXhppq0YtM5lObthSVgxOCSYczB32hcIiSzE4yR5lF/f ouSB86+Qbfq55AtTk/aE+1/lag== X-Google-Smtp-Source: APXvYqxSKHlSYNZxtRB93DUzq1Zd1V0ufQC4r1ezyVvI0G7yZhs1pWFG01Rr3MHkkqVvhwnulvdNKA== X-Received: by 2002:aa7:9348:: with SMTP id 8mr17293pfn.135.1574093526439; Mon, 18 Nov 2019 08:12:06 -0800 (PST) Received: from hermes.lan (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id 12sm21304969pjm.11.2019.11.18.08.12.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 08:12:06 -0800 (PST) Date: Mon, 18 Nov 2019 08:12:03 -0800 From: Stephen Hemminger To: Shahaf Shuler Cc: "olivier.matz@6wind.com" , Thomas Monjalon , "dev@dpdk.org" Message-ID: <20191118081203.3e4980f0@hermes.lan> In-Reply-To: <20191118100247.74241-1-shahafs@mellanox.com> References: <20191118100247.74241-1-shahafs@mellanox.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH] mbuf: extend pktmbuf pool private structure 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" Archived-At: List-Archive: On Mon, 18 Nov 2019 10:02:55 +0000 Shahaf Shuler wrote: > With the API and ABI freeze ahead, it will be good to reserve > some bits on the private structure for future use. > > Otherwise we will potentially need to maintain two different > private structure during 2020 period. > > There is already one use case for those reserved bits[1] > > The reserved field should be set to 0 by the user. > > [1] > https://patches.dpdk.org/patch/63077/ > > Signed-off-by: Shahaf Shuler > --- Understand the motivation but in my experience until you know what it is for, this doesn't work. And it creates lots of dead ends. https://en.wikipedia.org/wiki/You_aren%27t_gonna_need_it