From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx5.zte.com.cn (mx5.zte.com.cn [63.217.80.70]) by dpdk.org (Postfix) with ESMTP id E8B1EF925 for ; Mon, 19 Dec 2016 12:11:53 +0100 (CET) X-MAILFROM: X-RCPTTO: X-FROMIP: 10.30.3.20 X-SEG-Scaned: 1 X-Received: unknown,10.30.3.20,20161219191001 Received: from unknown (HELO mse01.zte.com.cn) (10.30.3.20) by localhost with (AES256-SHA encrypted) SMTP; 19 Dec 2016 11:10:01 -0000 Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id uBJBBgBA031493; Mon, 19 Dec 2016 19:11:42 +0800 (GMT-8) (envelope-from wang.yong19@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.43.166.165]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2016121919114486-305836 ; Mon, 19 Dec 2016 19:11:44 +0800 From: Yong Wang To: john.mcnamara@intel.com Cc: dev@dpdk.org, Yong Wang Date: Mon, 19 Dec 2016 07:14:38 -0500 Message-Id: <1482149678-18363-1-git-send-email-wang.yong19@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2016-12-19 19:11:45, Serialize by Router on notes_smtp/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2016-12-19 19:11:30, Serialize complete at 2016-12-19 19:11:30 X-MAIL: mse01.zte.com.cn uBJBBgBA031493 X-HQIP: 127.0.0.1 Subject: [dpdk-dev] [PATCH] doc: fix a mistake in prog guide 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: , X-List-Received-Date: Mon, 19 Dec 2016 11:11:54 -0000 Signed-off-by: Yong Wang --- doc/guides/prog_guide/vhost_lib.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst index 4f997d4..f0862e6 100644 --- a/doc/guides/prog_guide/vhost_lib.rst +++ b/doc/guides/prog_guide/vhost_lib.rst @@ -95,7 +95,7 @@ The following is an overview of the Vhost API functions: * for VM2NIC case, the ``nb_tx_desc`` has to be small enough: <= 64 if virtio indirect feature is not enabled and <= 128 if it is enabled. - The is because when dequeue zero copy is enabled, guest Tx used vring will + This is because when dequeue zero copy is enabled, guest Tx used vring will be updated only when corresponding mbuf is freed. Thus, the nb_tx_desc has to be small enough so that the PMD driver will run out of available Tx descriptors and free mbufs timely. Otherwise, guest Tx vring would be -- 1.8.3.1