From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tiwei Bie Subject: Re: [RFC v5 0/5] virtio: support packed ring Date: Fri, 25 May 2018 11:07:55 +0800 Message-ID: <20180525030754.GA11557@debian> References: <20180522081648.14768-1-tiwei.bie@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Cc: mst@redhat.com, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, wexu@redhat.com, jfreimann@redhat.com To: Jason Wang Return-path: Received: from mga11.intel.com ([192.55.52.93]:33209 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751768AbeEYDHg (ORCPT ); Thu, 24 May 2018 23:07:36 -0400 Content-Disposition: inline In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Fri, May 25, 2018 at 10:31:26AM +0800, Jason Wang wrote: > On 2018年05月22日 16:16, Tiwei Bie wrote: > > Hello everyone, > > > > This RFC implements packed ring support in virtio driver. > > > > Some simple functional tests have been done with Jason's > > packed ring implementation in vhost (RFC v4): > > > > https://lkml.org/lkml/2018/5/16/501 > > > > Both of ping and netperf worked as expected w/ EVENT_IDX > > disabled. Ping worked as expected w/ EVENT_IDX enabled, > > but netperf didn't (A hack has been added in the driver > > to make netperf test pass in this case. The hack can be > > found by `grep -rw XXX` in the code). > > Looks like this is because a bug in vhost which wrongly track signalled_used > and may miss an interrupt. After fixing that, both side works like a charm. > > I'm testing vIOMMU and zerocopy, and will post a new version shortly. (Hope > it would be the last RFC version). Great to know that. Thanks a lot! :) Best regards, Tiwei Bie