From patchwork Thu Oct 29 11:50:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ciara Loftus X-Patchwork-Id: 537802 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from archives.nicira.com (li376-54.members.linode.com [96.126.127.54]) by ozlabs.org (Postfix) with ESMTP id 7BB3D1402D4 for ; Thu, 29 Oct 2015 22:51:01 +1100 (AEDT) Received: from archives.nicira.com (localhost [127.0.0.1]) by archives.nicira.com (Postfix) with ESMTP id B2B3C10574; Thu, 29 Oct 2015 04:51:00 -0700 (PDT) X-Original-To: dev@openvswitch.org Delivered-To: dev@openvswitch.org Received: from mx1e3.cudamail.com (mx1.cudamail.com [69.90.118.67]) by archives.nicira.com (Postfix) with ESMTPS id 7BC8A10572 for ; Thu, 29 Oct 2015 04:50:59 -0700 (PDT) Received: from bar5.cudamail.com (localhost [127.0.0.1]) by mx1e3.cudamail.com (Postfix) with ESMTPS id 029124202BB for ; Thu, 29 Oct 2015 05:50:59 -0600 (MDT) X-ASG-Debug-ID: 1446119458-09eadd4c91542130001-byXFYA Received: from mx1-pf1.cudamail.com ([192.168.24.1]) by bar5.cudamail.com with ESMTP id nb9FV70DP2MQhN1z (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 29 Oct 2015 05:50:58 -0600 (MDT) X-Barracuda-Envelope-From: cloftus@ecsmtp.ir.intel.com X-Barracuda-RBL-Trusted-Forwarder: 192.168.24.1 Received: from unknown (HELO mga03.intel.com) (134.134.136.65) by mx1-pf1.cudamail.com with SMTP; 29 Oct 2015 11:50:57 -0000 Received-SPF: none (mx1-pf1.cudamail.com: domain at ecsmtp.ir.intel.com does not designate permitted sender hosts) X-Barracuda-Apparent-Source-IP: 134.134.136.65 X-Barracuda-RBL-IP: 134.134.136.65 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP; 29 Oct 2015 04:50:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,214,1444719600"; d="scan'208";a="837916446" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga002.jf.intel.com with ESMTP; 29 Oct 2015 04:50:56 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id t9TBotpq025770 for ; Thu, 29 Oct 2015 11:50:55 GMT Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id t9TBotvo030269 for ; Thu, 29 Oct 2015 11:50:55 GMT Received: (from cloftus@localhost) by sivswdev01.ir.intel.com with id t9TBotP3030265 for dev@openvswitch.org; Thu, 29 Oct 2015 11:50:55 GMT X-CudaMail-Envelope-Sender: cloftus@ecsmtp.ir.intel.com From: Ciara Loftus To: dev@openvswitch.org X-CudaMail-MID: CM-E1-1028011692 X-CudaMail-DTE: 102915 X-CudaMail-Originating-IP: 134.134.136.65 Date: Thu, 29 Oct 2015 11:50:55 +0000 X-ASG-Orig-Subj: [##CM-E1-1028011692##][PATCH] INSTALL.DPDK: Mention issue with QEMU v2.4.0 & dpdkvhostuser Message-Id: <1446119455-30231-1-git-send-email-ciara.loftus@intel.com> X-Mailer: git-send-email 1.7.4.1 X-GBUdb-Analysis: 0, 134.134.136.65, Ugly c=0.200527 p=-0.142857 Source Normal X-MessageSniffer-Rules: 0-0-0-4223-c X-Barracuda-Connect: UNKNOWN[192.168.24.1] X-Barracuda-Start-Time: 1446119458 X-Barracuda-Encrypted: DHE-RSA-AES256-SHA X-Barracuda-URL: https://web.cudamail.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at cudamail.com X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 0.60 X-Barracuda-Spam-Status: No, SCORE=0.60 using per-user scores of TAG_LEVEL=3.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=3.0 tests=BSF_SC5_MJ1963, RDNS_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.23921 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_NONE Delivered to trusted network by a host with no rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 Subject: [ovs-dev] [PATCH] INSTALL.DPDK: Mention issue with QEMU v2.4.0 & dpdkvhostuser X-BeenThere: dev@openvswitch.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dev-bounces@openvswitch.org Sender: "dev" Currently when using QEMU v2.4.0+, two (or more) dpdkvhostuser ports cannot be unbound from the kernel driver in the guest without causing the ovs-vswitchd process to crash. Document this limitation. Signed-off-by: Ciara Loftus --- INSTALL.DPDK.md | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md index 7bf110c..01963e9 100644 --- a/INSTALL.DPDK.md +++ b/INSTALL.DPDK.md @@ -891,6 +891,16 @@ Restrictions: core count of the system to be less than or equal to 64 when using an XL710 interface with DPDK. + vHost and QEMU v2.4.0+: + - For versions of QEMU v2.4.0 and later, it is currently not possible to + unbind more than one dpdkvhostuser port from the guest kernel driver without + causing the ovs-vswitchd process to crash. If this is a requirement for your + use case, it is recommended to use a version of QEMU between v2.2.0 and + v2.3.1 (inclusive). This problem will likely be resolved in Open vSwitch at + a later date, when the next release of DPDK is available and integrated. + Note: The QEMU commit ID that breaks compatibility is + 294ce717e0f212ed0763307f3eab72b4a1bdf4d0. + Bug Reporting: --------------