Hi William,
Here are some more details, this is a port to port test (same port
in as
out) using the following rule:
ovs-ofctl add-flow ovs_pvp_br0 "in_port=eno1,action=IN_PORT"
Sent packets wire speed, and crash…
(gdb) bt
#0 0x00007fbc6a78193f in raise () from /lib64/libc.so.6
#1 0x00007fbc6a76bc95 in abort () from /lib64/libc.so.6
#2 0x00000000004ed1a1 in __umem_elem_push_n (addrs=0x7fbc40f2ec50,
n=32, umemp=0x24cc790) at lib/xdpsock.c:32
#3 umem_elem_push_n (umemp=0x24cc790, n=32,
addrs=addrs@entry=0x7fbc40f2eea0) at lib/xdpsock.c:43
#4 0x00000000009b4f51 in afxdp_complete_tx (xsk=0x24c86f0) at
lib/netdev-afxdp.c:736
#5 netdev_afxdp_batch_send (netdev=<optimized out>, qid=0,
batch=0x7fbc24004e80, concurrent_txq=<optimized out>) at
lib/netdev-afxdp.c:763
#6 0x0000000000908041 in netdev_send (netdev=<optimized out>,
qid=qid@entry=0, batch=batch@entry=0x7fbc24004e80,
concurrent_txq=concurrent_txq@entry=true)
at lib/netdev.c:800
#7 0x00000000008d4c34 in dp_netdev_pmd_flush_output_on_port
(pmd=pmd@entry=0x7fbc40f32010, p=p@entry=0x7fbc24004e50) at
lib/dpif-netdev.c:4187
#8 0x00000000008d4f4f in dp_netdev_pmd_flush_output_packets
(pmd=pmd@entry=0x7fbc40f32010, force=force@entry=false) at
lib/dpif-netdev.c:4227
#9 0x00000000008dd2e7 in dp_netdev_pmd_flush_output_packets
(force=false, pmd=0x7fbc40f32010) at lib/dpif-netdev.c:4282
#10 dp_netdev_process_rxq_port (pmd=pmd@entry=0x7fbc40f32010,
rxq=0x24ce650, port_no=1) at lib/dpif-netdev.c:4282
#11 0x00000000008dd64d in pmd_thread_main (f_=<optimized out>) at
lib/dpif-netdev.c:5449
#12 0x000000000095e95d in ovsthread_wrapper (aux_=<optimized out>)
at
lib/ovs-thread.c:352
#13 0x00007fbc6b0a12de in start_thread () from
/lib64/libpthread.so.0
#14 0x00007fbc6a846a63 in clone () from /lib64/libc.so.6
After this crash, systemd restart OVS, and it crashed again (guess
traffic was still flowing for a bit with the NORMAL rule installed):
Program terminated with signal SIGSEGV, Segmentation fault.
#0 netdev_afxdp_rxq_recv (rxq_=0x2d5a860, batch=0x7f46f8ff70d0,
qfill=0x0) at lib/netdev-afxdp.c:583
583 rx->fd = xsk_socket__fd(xsk->xsk);
[Current thread is 1 (Thread 0x7f46f8ff9700 (LWP 28171))]
(gdb) bt
#0 netdev_afxdp_rxq_recv (rxq_=0x2d5a860, batch=0x7f46f8ff70d0,
qfill=0x0) at lib/netdev-afxdp.c:583
#1 0x0000000000907f31 in netdev_rxq_recv (rx=<optimized out>,
batch=batch@entry=0x7f46f8ff70d0, qfill=<optimized out>) at
lib/netdev.c:710
#2 0x00000000008dd1d3 in dp_netdev_process_rxq_port
(pmd=pmd@entry=0x2d8f0c0, rxq=0x2d8c090, port_no=2) at
lib/dpif-netdev.c:4257
#3 0x00000000008dd64d in pmd_thread_main (f_=<optimized out>) at
lib/dpif-netdev.c:5449
#4 0x000000000095e95d in ovsthread_wrapper (aux_=<optimized out>)
at
lib/ovs-thread.c:352
#5 0x00007f47229732de in start_thread () from
/lib64/libpthread.so.0
#6 0x00007f4722118a63 in clone () from /lib64/libc.so.6
I did not further investigate, but it should be easy to replicate.
This
is the same setup that worked fine with the v8 patchset for port to
port.
Next step was to verify PVP was fixed, but could not get there…
Cheers,
