From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 62716D00F for ; Thu, 27 Apr 2017 10:05:15 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 69A74C04BD2F; Thu, 27 Apr 2017 08:05:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 69A74C04BD2F Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=maxime.coquelin@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 69A74C04BD2F Received: from [10.36.112.43] (ovpn-112-43.ams2.redhat.com [10.36.112.43]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2222317599; Thu, 27 Apr 2017 08:05:12 +0000 (UTC) From: Maxime Coquelin To: Zhiyong Yang , dev@dpdk.org Cc: yuanhan.liu@linux.intel.com, ciara.loftus@intel.com, =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= References: <1493274893-40764-1-git-send-email-zhiyong.yang@intel.com> <57212715-6192-dba2-418a-2418a5d14953@redhat.com> Message-ID: <92318dc5-ad68-fa83-cea4-0b739a12a97f@redhat.com> Date: Thu, 27 Apr 2017 10:05:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.0 MIME-Version: 1.0 In-Reply-To: <57212715-6192-dba2-418a-2418a5d14953@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 27 Apr 2017 08:05:14 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH] vhost: fix MQ fails to startup 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, 27 Apr 2017 08:05:15 -0000 On 04/27/2017 09:56 AM, Maxime Coquelin wrote: > Hi Zhiyong, > > +Marc-André > > On 04/27/2017 08:34 AM, Zhiyong Yang wrote: >> vhost since dpdk17.02 + qemu2.7 and above will cause failures of >> new connection when negotiating to set MQ. (one queue pair works >> well).Because there exist some bugs in qemu code when introducing >> VHOST_USER_PROTOCOL_F_REPLY_ACK to qemu. when dealing with the vhost >> message VHOST_USER_SET_MEM_TABLE for the second time, qemu indeed >> doesn't send the messge (The message needs to be sent only once)but >> still will be waiting for dpdk's reply ack, then, qemu is always >> freezing. DPDK code works in the right way. > > I'm looking at Qemu's vhost_user_set_mem_table() function, but fail to > see how it could wait for the reply-ack if it didn't send the > VHOST_USER_SET_MEM_TABLE request before. Oh, sorry, I get it now. Are you working for a fix in Qemu, or have you already reported the problem? Thanks, Maxime