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 7A68AA0508; Mon, 9 May 2022 06:16:07 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 1C2A04069D; Mon, 9 May 2022 06:16:07 +0200 (CEST) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by mails.dpdk.org (Postfix) with ESMTP id BC9ED4068F; Mon, 9 May 2022 06:16:04 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652069766; x=1683605766; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=vQzyvucQr5mOlP3rBN+AEkz6rPUIy6xajYiejEyXPUo=; b=NLZygOPmsyE4qpPPoJzEAKbwPTWMih7baHJmlVtTAtV41+Zprt8XbyAV H8W50ygwj6qswUWxRqkcvHLsOoXILmZZ1e6rB7njXh4cy9+dCKIDVRLvg IYAW0YWYSKy1BGMkR/qBFZlbpQtNUaJEfRQ+7XhwwaidYGdRBwxX8GKoG KEvhdddaymu0M4UYW6YiEeMB8hI/GahhP4Jq6pOh5M4lOrf3qif4Q7PY+ N91EwpL/z97Qyyr+a5SwatGrKSxEU8JT/b5+Gtk85SWZd69Oc1CS6V3Ba C1yqFqeFQPS4LcMVEcQkq7JWHBstssnavlZW7YkpMvcjmLEtQc5zJuDbe g==; X-IronPort-AV: E=McAfee;i="6400,9594,10341"; a="331961980" X-IronPort-AV: E=Sophos;i="5.91,210,1647327600"; d="scan'208";a="331961980" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2022 21:15:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,210,1647327600"; d="scan'208";a="655874254" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by FMSMGA003.fm.intel.com with ESMTP; 08 May 2022 21:15:54 -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 v4] doc: fix vhost multi-queue reconnection Date: Mon, 9 May 2022 04:11:58 +0000 Message-Id: <20220509041158.61185-1-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: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-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 --- v4: * Corrected the QEMU fix version. v3: * Updated affected QEMU versions. v2: * Added 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..570550843a 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 +---------------------------------------------------------------------- **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