From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) by dpdk.org (Postfix) with ESMTP id 27CC22A62 for ; Thu, 30 Nov 2017 10:17:57 +0100 (CET) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 7866A20D2F; Thu, 30 Nov 2017 04:17:55 -0500 (EST) Received: from frontend2 ([10.202.2.161]) by compute1.internal (MEProxy); Thu, 30 Nov 2017 04:17:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-sender :x-me-sender:x-sasl-enc; s=mesmtp; bh=mImr5gTMGxyZpFBq/Whz6nG+N3 2IH1NTmotsPGIBLIg=; b=gqxEvctWOQKRClHmtoppE/isCUzBFdgicqx6ELB1Pl dJkuoRC2kxwR2+Msoqd77DQiLHGx1Bk29DV59ROQjvpwY1Ttta7P2h27WqlpYHcn cW4cUQTpP6F2VfK65z4lInq4l7f+HcZMSKRP27nD7DqfL5/R3znnRLtJgQA4TfKe 0= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=mImr5g TMGxyZpFBq/Whz6nG+N32IH1NTmotsPGIBLIg=; b=Jo7HqEx+g74lLpI/5/0kzw vL09acvECHwZkK7HSJ0kVkkFxZM+fRmdqoxEnqLfHQTuHnIQJAAEQ13xwdwAYsE+ mZ4IDHzYlbUhjhTgOyh06x2iS/WRm9YxiMknXhiInX9Z52tIlBh6aj9zz5JLhu5n naWZjO2v+egk59RUn1z5IujhSfvp46JrOSgb9XPvrWrl0wOdh7Z1Fg6Q3WEUMkzV z/vVwjlx65CEcgrq+rptMpE3cz2qHhwwxxONLtjl8NwvGhdfX1QQfRfuHKg2rKjF qNJILzdLBPHAfQFlvBBU2OEXxKP7awRtgyyB1LRJayiMiPyRnij40ADLDwTsihjw == X-ME-Sender: Received: from xps.localnet (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id DFF28249FA; Thu, 30 Nov 2017 04:17:54 -0500 (EST) From: Thomas Monjalon To: Chas Williams <3chas3@gmail.com> Cc: dev@dpdk.org, anatoly.burakov@intel.com, Chas Williams Date: Thu, 30 Nov 2017 10:17:52 +0100 Message-ID: <2600590.OO5gESNU7Y@xps> In-Reply-To: <20171130025739.4349-1-3chas3@gmail.com> References: <20171130025739.4349-1-3chas3@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH] eal: add option to force IOVA as PA mode 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: , X-List-Received-Date: Thu, 30 Nov 2017 09:17:57 -0000 30/11/2017 03:57, Chas Williams: > From: Chas Williams > > The IOMMU in some machines report that they can only support > limited widths. IOVA virtual addresses may exceed this width > making the use of IOVA virtual addresses difficult. The option > CONFIG_RTE_LIBRTE_USE_PHYS_IOVA can used to force IOVA physical > address usage. Which machines are you talking about? A run-time option may be a better solution.