Re: [PATCH bpf-next] selftests/bpf: Enable INET_XFRM_TUNNEL in config

[Ilya Leoshkevich <iii@linux.ibm.com>]

On Fri, 2024-05-24 at 18:27 +0200, Daniel Borkmann wrote:
> On 5/16/24 3:41 AM, Geliang Tang wrote:
> > From: Geliang Tang <tanggeliang@kylinos.cn>
> > 
> > The kconfigs CONFIG_INET_XFRM_TUNNEL and CONFIG_INET6_XFRM_TUNNEL
> > are
> > needed by test_tunnel tests. This patch enables them together with
> > the
> > dependent kconfigs CONFIG_INET_IPCOMP and CONFIG_INET6_IPCOMP.
> > 
> > Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> > ---
> >   tools/testing/selftests/bpf/config | 4 ++++
> >   1 file changed, 4 insertions(+)
> > 
> > diff --git a/tools/testing/selftests/bpf/config
> > b/tools/testing/selftests/bpf/config
> > index eeabd798bc3a..8aa56e6bdac1 100644
> > --- a/tools/testing/selftests/bpf/config
> > +++ b/tools/testing/selftests/bpf/config
> > @@ -95,3 +95,7 @@ CONFIG_XDP_SOCKETS=y
> >   CONFIG_XFRM_INTERFACE=y
> >   CONFIG_TCP_CONG_DCTCP=y
> >   CONFIG_TCP_CONG_BBR=y
> > +CONFIG_INET_IPCOMP=y
> > +CONFIG_INET_XFRM_TUNNEL=y
> > +CONFIG_INET6_IPCOMP=y
> > +CONFIG_INET6_XFRM_TUNNEL=y
> > 
> 
> [ +Ilya ]
> 
> Looks like this triggers a boot hang on s390x :
> 
> https://github.com/kernel-patches/bpf/actions/runs/9215175853/job/25353574288

Hi,

I could not reproduce this neither with vmtest nor with my own build,
and it doesn't look related.

I'm not exactly sure what could cause d_alloc_parallel() to hang, but
apparently the CI is using a different vmtest script, which uses 9p to
mount root - perhaps there is a deadlock in 9p?

Can someone retrigger the build to see if the issue persists?

Best regards,
Ilya