From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 980B8A045E for ; Thu, 30 May 2019 19:48:31 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 60B09493D; Thu, 30 May 2019 19:48:29 +0200 (CEST) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id 152EE2B9A for ; Thu, 30 May 2019 19:48:27 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 May 2019 10:48:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,532,1549958400"; d="scan'208";a="180020073" Received: from bwalker-desk.ch.intel.com ([143.182.136.145]) by fmsmga002.fm.intel.com with ESMTP; 30 May 2019 10:48:26 -0700 From: Ben Walker To: dev@dpdk.org Date: Thu, 30 May 2019 10:48:07 -0700 Message-Id: <20190530174819.1160221-1-benjamin.walker@intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] eal/pci: Improve automatic selection of IOVA 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" In SPDK, not all drivers are registered with DPDK at start up time. Previously, that meant DPDK always chose to set itself up in IOVA_PA mode. Instead, when the correct iova choice is unclear based on the devices and drivers known to DPDK at start up time, use other heuristics (such as whether /proc/self/pagemap is accessible) to make a better choice. This enables SPDK to run as an unprivileged user again without requiring users to explicitly set the iova mode on the command line.