Fw: [Bug 208275] New: kernel hang occasionally while running the sample of xdpsock

[Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>]

Begin forwarded message:

Date: Mon, 22 Jun 2020 10:13:52 +0000
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
To: stephen@xxxxxxxxxxxxxxxxxx
Subject: [Bug 208275] New: kernel hang occasionally while running the sample of xdpsock


https://bugzilla.kernel.org/show_bug.cgi?id=208275

            Bug ID: 208275
           Summary: kernel hang occasionally while running the sample of
                    xdpsock
           Product: Networking
           Version: 2.5
    Kernel Version: 5.7.0
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Other
          Assignee: stephen@xxxxxxxxxxxxxxxxxx
          Reporter: goodluckwillcomesoon@xxxxxxxxx
        Regression: No

Distribution:
5.7.0-1.el7.centos.x86_64

Hardware Environment:
Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.1.7 06/16/2016

Software Environment:


Problem Description:
kernel hang occasionally while running the sample of xdpsock

Steps to reproduce:

I want to test the rx performace of AF_XDP. I change the nic to 4 queues by cmd
`ethtool -L p6p1 combined 4`, then I will create 1 socket for every queue.

for ((i=0; i<4; i++));
do 
./xdpsock -r -z -i p6p1 -m -q $i &
done

I run the xdpsock in samples/bpf using the shell command above.
And occasionally the kernel hang, so I have to power off and on.

Additonal information:

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