[Bug 286366] rtwn0: rtwn_rx_copy_to_mbuf: could not allocate RX mbuf

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 26 Apr 2025 16:02:28 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286366

            Bug ID: 286366
           Summary: rtwn0: rtwn_rx_copy_to_mbuf: could not allocate RX
                    mbuf
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: eduardo@FreeBSD.org

RTL8811AU and RTL8821AU usb nic tested on recent main amd64/aarch64, mode 11ac:

`git pull --rebase` takes too long and sometimes fails

iperf3 -c local.pc -R
Connecting to host hp, port 5201
Reverse mode, remote host hp is sending
[  5] local 192.168.1.82 port 43550 connected to 192.168.1.100 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  0.00 Bytes  0.00 bits/sec
[  5]   1.00-2.06   sec  0.00 Bytes  0.00 bits/sec
[  5]   2.06-3.00   sec   128 KBytes  1.11 Mbits/sec
[  5]   3.00-4.03   sec   128 KBytes  1.02 Mbits/sec
[  5]   4.03-5.01   sec  0.00 Bytes  0.00 bits/sec
[  5]   5.01-6.01   sec   256 KBytes  2.10 Mbits/sec
[  5]   6.01-7.06   sec  0.00 Bytes  0.00 bits/sec
[  5]   7.06-8.06   sec  0.00 Bytes  0.00 bits/sec
[  5]   8.06-9.01   sec  0.00 Bytes  0.00 bits/sec
[  5]   9.01-10.01  sec   128 KBytes  1.04 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.01  sec   768 KBytes   628 Kbits/sec  156            sender
[  5]   0.00-10.01  sec   640 KBytes   524 Kbits/sec                  receiver

iperf Done.

relevant /var/log/messages:
...
rtwn0: rtwn_rx_copy_to_mbuf: could not allocate RX mbuf
rtwn0: rtwn_rx_copy_to_mbuf: could not allocate RX mbuf
rtwn0: rtwn_rx_copy_to_mbuf: could not allocate RX mbuf
...

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