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 D5760A0613 for ; Fri, 27 Sep 2019 10:49:51 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id AC7282F4F; Fri, 27 Sep 2019 10:49:51 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 66FF52C23; Fri, 27 Sep 2019 10:49:49 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AA7D430ADBAC; Fri, 27 Sep 2019 08:49:48 +0000 (UTC) Received: from [10.36.112.41] (ovpn-112-41.ams2.redhat.com [10.36.112.41]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 55A4D60923; Fri, 27 Sep 2019 08:49:46 +0000 (UTC) To: Noa Ezra , tiwei.bie@intel.com, zhihong.wang@intel.com Cc: matan@mellanox.com, dev@dpdk.org, stable@dpdk.org References: <1560924960-221163-1-git-send-email-noae@mellanox.com> <1561012383-306353-1-git-send-email-noae@mellanox.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <1561012383-306353-1-git-send-email-noae@mellanox.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Fri, 27 Sep 2019 08:49:48 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH v2] net/vhost: fix redundant queue state event 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 6/20/19 8:33 AM, Noa Ezra wrote: > In some situations, when a virtual machine is starting, > vring_state_changed can be called while there was no change in the > queue state. This fix makes sure that there was really a change in the > queue state before calling the callback for EVENT_QUEUE_STATE. > > Fixes: ee584e9710b9 ("vhost: add driver on top of the library") > Cc: stable@dpdk.org > > Signed-off-by: Noa Ezra > Reviewed-by: Matan Azrad > --- > v2 remove checkpatch warnings > --- > drivers/net/vhost/rte_eth_vhost.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c > index cad1e5c..fbe7a37 100644 > --- a/drivers/net/vhost/rte_eth_vhost.c > +++ b/drivers/net/vhost/rte_eth_vhost.c > @@ -855,6 +855,10 @@ struct vhost_xstats_name_off { > /* won't be NULL */ > state = vring_states[eth_dev->data->port_id]; > rte_spinlock_lock(&state->lock); > + if (state->cur[vring] == enable) { > + rte_spinlock_unlock(&state->lock); > + return 0; > + } > > state->cur[vring] = enable; > state->max_vring = RTE_MAX(vring, state->max_vring); > Reviewed-by: Maxime Coquelin Thanks, Maxime