After more debugging, the reason turned out to be related to the level
of libxdp called out by the bpf-examples. 'master' level of libxdp
works; the first commit level of libxdp that works for me is
tjcw@tjcw-KVM:~/workspace/bpf-examples/lib/xdp-tools$ git bisect old
b572cd6b5a6462280db389b94586c2b5450887a9 is the first new commit
commit b572cd6b5a6462280db389b94586c2b5450887a9
Author: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
Date: Mon Sep 12 12:32:26 2022 +0000
xsk: remove unused variable outstanding_tx
Remove the unused variable outstanding_tx.
Signed-off-by: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
lib/libxdp/xsk.c | 2 --
1 file changed, 2 deletions(-)
tjcw@tjcw-KVM:~/workspace/bpf-examples/lib/xdp-tools$
I believe Toke is going to adjust the submodule level of libxdp that
is selected for bpf-examples to use.
On Thu, 24 Nov 2022 at 15:21, Chris Ward <tjcw01@xxxxxxxxx> wrote:
>
> The reason was a mismatch between the levels of libxdp and libbpf in
> use. To fix this it was necessary to add -fPIC to the CFLAGS when
> building libbpf. I have raised a PR
> https://github.com/libbpf/libbpf/pull/631 with the fix and a little
> more detail as to why I need it. Please review and merge.
>
> Chris Ward, IBM
