From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [58.251.152.64]) by dpdk.org (Postfix) with ESMTP id 0AD0711C5 for ; Sat, 21 Mar 2015 09:07:25 +0100 (CET) Received: from 172.24.2.119 (EHLO szxeml434-hub.china.huawei.com) ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CLC72309; Sat, 21 Mar 2015 16:07:22 +0800 (CST) Received: from localhost (10.177.19.115) by szxeml434-hub.china.huawei.com (10.82.67.225) with Microsoft SMTP Server id 14.3.158.1; Sat, 21 Mar 2015 16:07:19 +0800 From: linhaifeng To: Date: Sat, 21 Mar 2015 16:07:17 +0800 Message-ID: <1426925237-8312-1-git-send-email-haifeng.lin@huawei.com> X-Mailer: git-send-email 1.8.5.2.msysgit.0 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.177.19.115] X-CFilter-Loop: Reflected Subject: [dpdk-dev] [PATCH] cast used->idx to volatile X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Mar 2015 08:07:36 -0000 From: Linhaifeng Same as rte_vhost_enqueue_burst we should cast used->idx to volatile before notify guest. Signed-off-by: Linhaifeng --- lib/librte_vhost/vhost_rxtx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c index 535c7a1..8d674d1 100644 --- a/lib/librte_vhost/vhost_rxtx.c +++ b/lib/librte_vhost/vhost_rxtx.c @@ -722,7 +722,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id, } rte_compiler_barrier(); - vq->used->idx += entry_success; + *(volatile uint16_t *)&vq->used->idx += entry_success; /* Kick guest if required. */ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) eventfd_write((int)vq->callfd, 1); -- 1.8.5.2.msysgit.0