Hi Ben, Thanks for your reply very much.
Currently, if we delete a port, ovs only flush the related datapath flows. So I have an opinions as follows: When deleting the ovs bridge br-plyXXX, we can flush per br-plyXXX's port related datapath flows instead of flush all datapath flows. Is that ok? Thanks. -----邮件原件----- 发件人: Ben Pfaff [mailto:b...@ovn.org] 发送时间: 2018年5月25日 1:13 收件人: Lilijun (Jerry, Cloud Networking) <jerry.lili...@huawei.com> 抄送: d...@openvswitch.org; ovs-disc...@openvswitch.org; liucheng (J) <liuchen...@huawei.com>; lixiao (H) <lixia...@huawei.com> 主题: Re: 答复: Question: why ovs flush all datapath flows when destroying br/ofproto? It's more work to selectively flush and no one has implemented that. On Thu, May 24, 2018 at 02:55:00AM +0000, Lilijun (Jerry, Cloud Networking) wrote: > Are there anybody has some ideas about this question? > Thanks. > > -----邮件原件----- > 发件人: Lilijun (Jerry, Cloud Networking) > 发送时间: 2018年5月18日 11:02 > 收件人: d...@openvswitch.org; 'Ben Pfaff' <b...@ovn.org>; > ovs-disc...@openvswitch.org > 抄送: liucheng (J) <liuchen...@huawei.com>; lixiao (H) <lixia...@huawei.com> > 主题: Question: why ovs flush all datapath flows when destroying br/ofproto? > > Hi all, > > In my test, there are many VMs sending and receiving random flows using ovs. > Per VM has one virtio-net NIC and connect to ovs bridge named such as > br-plyXXX. These ovs bridges br-plyXXX are all connected to br-int using > patch port. > All VM's traffic can generate about 200 thousand datapath flows. I found that > all datapath flows were flushed when deleting one VM and it's own br-plyXXX. > And the implementation is in the function ofproto_destroy() calling > ofproto_flush__(). The flush work will delete all datapath flows and recreate > the upcall and revalidator threads. > As a result, other VM's all traffic will miss the datapath flows and make > upcall to match in the slow path in upcall threads. Their packet will be > dropped or get worse latency. > > So, why ovs flush all datapath flows when destroying br/ofproto? Can we only > flush the datapath flows related the destroying ofprotos? > > > B.R. > Jerry _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
