On Wed, 2018-12-05 at 14:32 -0800, Stephen Hemminger wrote: > The problem is a regression in 4.20 kernel. Bisecting now.
I was bisecting the kernel and the change that seems to introduce this regression is this one: commit ae6935ed7d424ffa74d634da00767e7b03c98fd3 Author: Stephen Hemminger <step...@networkplumber.org> Date: Fri Sep 14 09:10:17 2018 -0700 vmbus: split ring buffer allocation from open The UIO driver needs the ring buffer to be persistent(reused) across open/close. Split the allocation and setup of ring buffer out of vmbus_open. For normal usage vmbus_open/vmbus_close there are no changes; only impacts uio_hv_generic which needs to keep ring buffer memory and reuse when application restarts. Signed-off-by: Stephen Hemminger <sthem...@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> > Failure with logging is: > > $ sudo ./testpmd -l 0-1 -n2 --log-level=8 --log-level='pmd.*,8' -- > log-level='bus.vmbus,8' -- --port-topology=chained --forward- > mode=rxonly --stats-period 1 --eth-peer=0,00:15:5d:1e:20:c0 --txq 2 > --rxq 2 > EAL: Detected 4 lcore(s) > EAL: Detected 1 NUMA nodes > EAL: Multi-process socket /var/run/dpdk/rte/mp_socket > vmbus_scan_one(): Adding vmbus device 2dd1ce17-079e-403c-b352- > a1921ee207ee > vmbus_scan_one(): Adding vmbus device 635a7ae3-091e-4410-ad59- > 667c4f8c04c3 > vmbus_scan_one(): Adding vmbus device 58f75a6d-d949-4320-99e1- > a2a2576d581c > vmbus_scan_one(): Adding vmbus device 242ff919-07db-4180-9c2e- > b86cb68c8c55 > vmbus_scan_one(): Adding vmbus device 7cb9f65d-684d-44dc-9d55- > 13d40dd60570 > vmbus_scan_one(): Adding vmbus device a6dcdcb3-c4da-445a-bc12- > 9050eb9cebfc > vmbus_scan_one(): Adding vmbus device 2450ee40-33bf-4fbd-892e- > 9fb06e9214cf > vmbus_scan_one(): Adding vmbus device 99221fa0-24ad-11e2-be98- > 001aa01bbf6e > vmbus_scan_one(): Adding vmbus device d34b2567-b9b6-42b9-8778- > 0a4ec0b955bf > vmbus_scan_one(): Adding vmbus device fd149e91-82e0-4a7d-afa6- > 2a4166cbd7c0 > vmbus_scan_one(): Adding vmbus device b6650ff7-33bc-4840-8048- > e0676786f393 > vmbus_scan_one(): Adding vmbus device 5620e0c7-8062-4dce-aeb7- > 520c7ef76171 > vmbus_scan_one(): Adding vmbus device 1eccfd72-4b41-45ef-b73a- > 4a6e44c12924 > vmbus_scan_one(): Adding vmbus device 4487b255-b88c-403f-bb51- > d1f69cf17f87 > vmbus_scan_one(): Adding vmbus device b5fa4c59-1916-4725-935f- > 5c8d09d596c5 > vmbus_scan_one(): Adding vmbus device b30ed368-1a6f-4921-8d2b- > 4160a0dfc667 > vmbus_scan_one(): Adding vmbus device f5bee29c-1741-4aad-a4c2- > 8fdedb46dcc2 > EAL: Probing VFIO support... > EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using > unreliable clock cycles ! > EAL: PCI device 935f:00:02.0 on NUMA socket 0 > EAL: probe driver: 15b3:1014 net_mlx5 > net_mlx5: checking device "mlx5_0" > net_mlx5: PCI information matches for device "mlx5_0" > net_mlx5: no switch support detected > net_mlx5: MPW isn't supported > net_mlx5: SWP support: 0 > net_mlx5: tunnel offloading is supported > net_mlx5: MPLS over GRE/UDP tunnel offloading disabled due to old > OFED/rdma-core version or firmware configuration > net_mlx5: naming Ethernet device "935f:00:02.0" > net_mlx5: port is not active: "down" (1) > net_mlx5: checksum offloading is supported > net_mlx5: counters are not supported > net_mlx5: maximum Rx indirection table size is 512 > net_mlx5: VLAN stripping is supported > net_mlx5: FCS stripping configuration is supported > net_mlx5: hardware Rx end alignment padding is not supported > net_mlx5: MPS is disabled > net_mlx5: port 0 reserved UAR address space: 0x7f346659e000 > net_mlx5: port 0 MAC address is 00:15:5d:2a:16:66 > net_mlx5: port 0 MTU is 1500 > net_mlx5: port 0 forcing Ethernet interface up > net_mlx5: port 0 flow maximum priority: 5 > vmbus_probe_one_driver(): VMBUS device 635a7ae3-091e-4410-ad59- > 667c4f8c04c3 on NUMA socket 0 > vmbus_probe_one_driver(): probe driver: net_netvsc > eth_hn_probe(): >> > eth_hn_dev_init(): >> > hn_nvs_init(): NVS version 0x60001, NDIS version 6.30 > hn_nvs_conn_rxbuf(): connect rxbuff va=0x2200402000 gpad=0xe1e2d > hn_nvs_conn_rxbuf(): receive buffer size 1728 count 18811 > hn_nvs_conn_chim(): connect send buf va=0x2202302000 gpad=0xe1e2e > hn_nvs_conn_chim(): send buffer 16777216 section size:6144, > count:2730 > hn_nvs_handle_vfassoc(): VF serial 2 add to port 1 > hn_rndis_init(): RNDIS ver 1.0, aggpkt size 4026531839, aggpkt cnt 8, > aggpkt align 8 > hn_rndis_link_status(): link status 0x4001000b > hn_rndis_set_rxfilter(): set RX filter 0 done > hn_tx_pool_init(): create a TX send pool hn_txd_1 n=2730 size=32 > socket=0 > hn_rndis_get_eaddr(): MAC address 00:15:5d:2a:16:66 > eth_hn_dev_init(): VMBus max channels 64 > hn_rndis_query_rsscaps(): RX rings 64 indirect 128 caps 0x301 > eth_hn_dev_init(): Adding VF device > hn_vf_attach(): Attach VF device 0 > hn_nvs_set_datapath(): set datapath VF > vmbus_probe_one_driver(): VMBUS device 7cb9f65d-684d-44dc-9d55- > 13d40dd60570 on NUMA socket 0 > rte_vmbus_map_device(): Not managed by UIO driver, skipped > vmbus_probe_one_driver(): VMBUS device b30ed368-1a6f-4921-8d2b- > 4160a0dfc667 on NUMA socket 0 > rte_vmbus_map_device(): Not managed by UIO driver, skipped > Set rxonly packet forwarding mode > testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=155456, > size=2176, socket=0 > testpmd: preferred mempool ops selected: ring_mp_mc > Configuring Port 1 (socket 0) > hn_dev_configure(): >> > hn_rndis_link_status(): link status 0x40020006 > hn_subchan_configure(): open 1 subchannels > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 21 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 22 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 20 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 21 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 22 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 20 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 21 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 22 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 20 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 21 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 22 > vmbus_uio_get_subchan(): ring mmap not found (yet) for: 20
