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 C01B4A2E1B for ; Tue, 3 Sep 2019 09:34:57 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C10331C438; Tue, 3 Sep 2019 09:34:56 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 0A1AF1BF41; Tue, 3 Sep 2019 09:34:55 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 54B1C1029A81; Tue, 3 Sep 2019 07:34:54 +0000 (UTC) Received: from [10.36.112.25] (ovpn-112-25.ams2.redhat.com [10.36.112.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C41C05C1B5; Tue, 3 Sep 2019 07:34:49 +0000 (UTC) To: "Wang, Xiao W" , "Ye, Xiaolong" Cc: "Bie, Tiwei" , "Wang, Zhihong" , "amorenoz@redhat.com" , "dev@dpdk.org" , "jfreimann@redhat.com" , "stable@dpdk.org" References: <20190829080000.20806-1-maxime.coquelin@redhat.com> <20190829080000.20806-3-maxime.coquelin@redhat.com> <20190902083445.GB1665@intel.com> From: Maxime Coquelin Openpgp: preference=signencrypt Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.66]); Tue, 03 Sep 2019 07:34:54 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH 02/15] vhost: configure vDPA as soon as the device is ready 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" On 9/2/19 11:02 AM, Wang, Xiao W wrote: > Hi, > >> -----Original Message----- >> From: Ye, Xiaolong >> Sent: Monday, September 2, 2019 4:35 PM >> To: Maxime Coquelin >> Cc: Bie, Tiwei ; Wang, Zhihong >> ; amorenoz@redhat.com; Wang, Xiao W >> ; dev@dpdk.org; jfreimann@redhat.com; >> stable@dpdk.org >> Subject: Re: [PATCH 02/15] vhost: configure vDPA as soon as the device is >> ready >> >> On 08/29, Maxime Coquelin wrote: >>> There might not have any VHOST_USER_SET_VRING_CALL requests >>> sent once virtio device is ready. When it happens, the vDPA >>> device's dev_conf() callback may never be called. >>> >>> Fixes: 9f9014512822 ("vhost: configure vDPA device after set vring call >> message") >>> Cc: stable@dpdk.org >>> Cc: xiaolong.ye@intel.com >>> >>> Signed-off-by: Maxime Coquelin >>> --- >>> lib/librte_vhost/vhost_user.c | 3 +-- >>> 1 file changed, 1 insertion(+), 2 deletions(-) >>> >>> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c >>> index 0b72648a5..b1ea80c52 100644 >>> --- a/lib/librte_vhost/vhost_user.c >>> +++ b/lib/librte_vhost/vhost_user.c >>> @@ -2112,8 +2112,7 @@ vhost_user_msg_handler(int vid, int fd) >>> did = dev->vdpa_dev_id; >>> vdpa_dev = rte_vdpa_get_device(did); >>> if (vdpa_dev && virtio_is_ready(dev) && >>> - !(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) && >>> - msg.request.master == >> VHOST_USER_SET_VRING_CALL) { >>> + !(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { > > In the early beginning of vhost user messages, there seems to be a VHOST_USER_SET_VRING_CALL with invalid call fd, > not sure if QEMU has any update on this point. > If the virtio_is_ready() is based on that invalid call fd, then vdpa_dev_conf() cannot setup interrupt properly. > I think that's why in our previous implementation, we wait for the real call fd and then call dev_conf(). I think that when we receive the first SET_VRING_CALL request from Qemu, virtio_is_ready() should be false because the rings addresses won't be received yet. Did it fixed a real issue, or was it based on code/logs review? Thanks for the explanations, Maxime > BRs, > Xiao >