Re: [PATCHv10 bpf-next 2/4] xdp: extend xdp_redirect_map with broadcast support

On Mon, Apr 26, 2021 at 01:41:05PM +0200, Jesper Dangaard Brouer wrote:

quoted

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While running:
 $ sudo ./xdp_redirect_map_multi -F i40e2 i40e2
 Get interfaces 7 7
 libbpf: elf: skipping unrecognized data section(23) .eh_frame
 libbpf: elf: skipping relo section(24) .rel.eh_frame for section(23) .eh_frame
 Forwarding   10140845 pkt/s
 Forwarding   11767042 pkt/s
 Forwarding   11783437 pkt/s
 Forwarding   11767331 pkt/s

When starting:  sudo ./xdp_monitor --stats  

That seems the same issue I reported previously in our meeting.
https://bugzilla.redhat.com/show_bug.cgi?id=1906820#c4

I only saw it 3 times and can't reproduce it easily.

Do you have any idea where is the root cause?

All the information you need to find the root-cause is listed below.
I have even decoded where in the code it happens, and also include the
code with line-numbering and pointed to the line the crash happens in,
I don't think it is possible for me to be more specific and help further.

Thanks, I mixed this issue with the one I got previously, which I haven't
figure out yet. For this one, I have sent a propose in another reply (that
fix it in trace point event). Would you please help review.

Hangbin