[Bug 233022] [em][netmap] 12-BETA2 can not finish netmap transmission

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233022

            Bug ID: 233022
           Summary: [em][netmap] 12-BETA2 can not finish netmap
                    transmission
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: lev at FreeBSD.org

netmap's pkt-gen can not finish transmission of configured number of packaets
on I219-V (em0) at 12-BETA2. It stucks with non-flushed queue forever:

236.545902 main_thread [2605] 0 pps (0 pkts 0 bps in 1031501 usec) 0.00
avg_batch 99999 min_space
237.000000 sender_body [1687] pending tx tail 446 head 448 on ring 0
237.000007 sender_body [1687] pending tx tail 446 head 448 on ring 0
237.000011 sender_body [1687] pending tx tail 446 head 448 on ring 0
237.000016 sender_body [1687] pending tx tail 446 head 448 on ring 0
237.000020 sender_body [1687] pending tx tail 446 head 448 on ring 0
237.607508 main_thread [2605] 0 pps (0 pkts 0 bps in 1061606 usec) 0.00
avg_batch 99999 min_space
238.000000 sender_body [1687] pending tx tail 446 head 448 on ring 0
238.000005 sender_body [1687] pending tx tail 446 head 448 on ring 0
238.000009 sender_body [1687] pending tx tail 446 head 448 on ring 0
238.000013 sender_body [1687] pending tx tail 446 head 448 on ring 0
238.000017 sender_body [1687] pending tx tail 446 head 448 on ring 0

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