Hi Alex, On Wed, Jul 2, 2014 at 2:30 PM, Alex Wang <al...@nicira.com> wrote: > > > > On Tue, Jul 1, 2014 at 7:38 PM, Han Zhou <zhou...@gmail.com> wrote: >> >> Hi Alex, >> >> That's cool! >> Just one more question. >> > Due to the race condition in userspace, there is chance that two >> > overlapping megaflows could be installed in datapath. And this >> > causes userspace unable to delete the less inclusive megaflow flow >> > even after it timeout, since the flow_del logic will stop at the >> > first match of masked flow. >> >> Does it mean if the more inclusive megaflow (say A) is deleted, then >> the less inclusive megaflow (say B) can be deleted? If so, I can have >> a workaround without updating OVS version: I can find out the more >> inclusive megaflow and manually delete flows with ovs-dpctl in order >> (A -> B), then warning logs should stop, right? > > > Right. Note you should prevent the relevant traffic from installing the > 'more inclusive' flow between deletions. >
I did find out a more inclusive mega-flow, but failed when trying to delete that one: # ovs-dpctl del-flow system@ovs-system "skb_priority(0),in_port(2),eth(src=30:f7:0d:9b:64:41,dst=78:45:c4:fb:c2:2f),eth_type(0x0800),ipv4(src=10.120.139.226/0.0.0.0,dst=10.120.116.69/0.0.0.0,proto=6/0,tos=0/0,ttl=61/0,frag=no/0xff)" 2014-07-02T08:16:29Z|00001|dpif|WARN|system@ovs-system: failed to flow_del (Invalid argument) skb_priority(0),in_port(2),eth(src=30:f7:0d:9b:64:41,dst=78:45:c4:fb:c2:2f),eth_type(0x0800),ipv4(src=10.120.139.226,dst=10.120.116.69,proto=6,tos=0,ttl=61,frag=no) ovs-dpctl: deleting flow (Invalid argument) The error is now "Invalid argument". So what's wrong here? Best regards, Han _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
