On Wed, 23 Apr 2025 22:20:41 +0700 Bui Quang Minh wrote: > I've tried to make the setup_xsk into each test. However, I've an issue > that the XDP socket destruct waits for an RCU grace period as I see this > sock's flag SOCK_RCU_FREE is set. So if we start the next test right > away, we can have the error when setting up XDP socket again because > previous XDP socket has not unbound the network interface's queue yet. I > can resolve the issue by putting the sleep(1) after closing the socket > in xdp_helper: > > diff --git a/tools/testing/selftests/net/lib/xdp_helper.c > b/tools/testing/selftests/net/lib/xdp_helper.c > index f21536ab95ba..e882bb22877f 100644 > --- a/tools/testing/selftests/net/lib/xdp_helper.c > +++ b/tools/testing/selftests/net/lib/xdp_helper.c > @@ -162,5 +162,6 @@ int main(int argc, char **argv) > */ > > close(sock_fd); > + sleep(1); > return 0; > } > > Do you think it's enough or do you have a better suggestion here? Interesting :S What errno does the kernel return? EBUSY? Perhaps we could loop for a second retrying the bind() if kernel returns EBUSY in case it's just a socket waiting to be cleaned up?
