From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 93BC8A050D for ; Fri, 15 Apr 2022 04:09:00 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 89D714068A; Fri, 15 Apr 2022 04:09:00 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by mails.dpdk.org (Postfix) with ESMTP id 30ECD4003C; Fri, 15 Apr 2022 04:08:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649988538; x=1681524538; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=S99vWCOSc3M9lbpy1A+aVtG6rRDQjYI6it2q6BvX5N4=; b=agbEVZ8EPZ7t8SOVchGOfgsaPcqXG9kSjhAeI05535wpL6iU+r+JsQP4 XvK/c1uHXo2evR3XZIGh32uXbbo8Dw+ohUAEmd8E7ISeFREv4nMHRTrTU A1n8laMNYxmu88KxUcpgs568G3hl6/IqLbHBZ+gDPpw4pg1Oit2qwWs87 o0EwwKkdFCwEeWBvfBzHPS5LKmhaofNHJzOhQbsY4spX8Pf66X7vzKsls OGlYLLahWGgsxmbbf/kyBgccWJ809Xo+HIfY9oR4zP6Z0Ss9NARkvVRMB h+UyCI81b8TAoGXTBg2En3SZcwwoF3qY18kBXJ7+5R/ISXR2voGM+X65X Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10317"; a="262828425" X-IronPort-AV: E=Sophos;i="5.90,261,1643702400"; d="scan'208";a="262828425" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2022 19:08:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,261,1643702400"; d="scan'208";a="574106290" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by orsmga008.jf.intel.com with ESMTP; 14 Apr 2022 19:08:55 -0700 From: xuan.ding@intel.com To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, Xuan Ding , stable@dpdk.org Subject: [PATCH v3] doc: fix vhost multi-queue reconnection Date: Fri, 15 Apr 2022 02:08:01 +0000 Message-Id: <20220415020801.37612-1-xuan.ding@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220221072743.88049-1-xuan.ding@intel.com> References: <20220221072743.88049-1-xuan.ding@intel.com> X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org From: Xuan Ding Since QEMU 5.2.0 fixes the vhost split ring multi-queue reconnection issue in commit f66337bdbfda ("vhost-user: save features of multiqueues if chardev is closed"), this patch updates known issue to indicate the range of affeacted QEMU versions. Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue") Cc: stable@dpdk.org Signed-off-by: Xuan Ding --- v3: * Updated affected QEMU versions. v2: * Add fixes in commit title and log. --- doc/guides/rel_notes/known_issues.rst | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index 187d9c942e..bd89d58d24 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -885,14 +885,15 @@ Unsuitable IOVA mode may be picked as the default **Driver/Module**: ALL. -Vhost multi-queue reconnection failed with QEMU version >= 4.2.0 ----------------------------------------------------------------- +Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0-rc3 +-------------------------------------------------------------------------- **Description** It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only saves acked features for one vhost-net when vhost quits. When vhost reconnects to virtio-net/virtio-pmd in multi-queue situations, the features been - set multiple times are not consistent. + set multiple times are not consistent. QEMU-5.2.0 fixes this issue in commit + f66337bdbfda ("vhost-user: save features of multiqueues if chardev is closed"). **Implication** Vhost cannot reconnect back to virtio-net/virtio-pmd normally. -- 2.17.1