From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48523) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xbmaq-0005va-RH for qemu-devel@nongnu.org; Wed, 08 Oct 2014 04:27:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xbmaj-0008Br-2F for qemu-devel@nongnu.org; Wed, 08 Oct 2014 04:27:32 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:47631) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xbmai-0008B5-LK for qemu-devel@nongnu.org; Wed, 08 Oct 2014 04:27:25 -0400 Message-ID: <5434F529.8080706@huawei.com> Date: Wed, 8 Oct 2014 16:26:17 +0800 From: "Zhangjie (HZ)" MIME-Version: 1.0 References: <542A6B70.7090607@huawei.com> <20140930093356.GA3673@redhat.com> <5434EB0B.8010800@cloudius-systems.com> In-Reply-To: <5434EB0B.8010800@cloudius-systems.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [QA-virtio]:Why vring size is limited to 1024? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity , "Michael S. Tsirkin" Cc: liuyongan@huawei.com, qinchuanyu@huawei.com, Jason Wang , akong@redhat.com, qemu-devel@nongnu.org On 2014/10/8 15:43, Avi Kivity wrote: >> > > You could separate maximum request scatter/gather list size from the virtqueue size. They are totally unrelated - even now you can have a larger request by using indirect descriptors. Yes, there is no strong correlation between virtqueue size and iov form the code. -- Best Wishes! Zhang Jie