From: Dmitry Fleytman <dfley...@redhat.com> Hello dev@openvswitch.org!
We are working on Windows virtio network driver certification for virtual machines running "on top" of OpenVSwitch. The test suite used for Microsoft certification (HCK) contains tests that verify correct packet ordering for data flows between systems (virtual machines) under test. In some cases there are packet reordering issues that make tests fail. Part of problems we observe related to user mode services behavior. Namely, user mode logic groups incoming packets by flows and then process flows in arbitrary order based on flow hash keys values. This behavior may lead to unexpected packets reordering. For example two packets that belong to the same "logical stream" and differ by ECN bit only placed to different flows and may be transmitted in reverse order. We've prepared a patch that fixes the issue in a natural manner - preserves order of packets being routed via user mode services. It's our first patch for OpenVSwitch so if we miss something please let us know. Dmitry Fleytman (1): Out-of-order data packets in upcalls processing logic fixed ofproto/ofproto-dpif.c | 65 +++++++++++++++++++++++++++++++++++------------ 1 files changed, 48 insertions(+), 17 deletions(-) _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
