netdev - Re: [PATCH net-next 5/5] ebpf: Add sample ebpf program for SOCKET_SG

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Message-ID: <20180913005954.GA30305@oracle.com>
Date:   Wed, 12 Sep 2018 20:59:54 -0400
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     Tushar Dave <tushar.n.dave@...cle.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>, ast@...nel.org,
        daniel@...earbox.net, davem@...emloft.net,
        santosh.shilimkar@...cle.com, jakub.kicinski@...ronome.com,
        quentin.monnet@...ronome.com, jiong.wang@...ronome.com,
        sandipan@...ux.vnet.ibm.com, john.fastabend@...il.com,
        kafai@...com, rdna@...com, yhs@...com, netdev@...r.kernel.org,
        rds-devel@....oracle.com
Subject: Re: [PATCH net-next 5/5] ebpf: Add sample ebpf program for
 SOCKET_SG_FILTER

> On 09/11/2018 09:00 PM, Alexei Starovoitov wrote:
> >please no samples.
> >Add this as proper test to tools/testing/selftests/bpf
> >that reports PASS/FAIL and can be run automatically.
> >samples/bpf is effectively dead code.

Just a second.

You do realize that RDS is doing real networking, so it needs
RDMA capable hardware to test the rds_rdma paths? Also, when we
"talk to ourselves" we default to the rds_loop transport, so
we would even bypass the rds-tcp module.

I dont think this can be tested with some academic "test it 
over lo0" exercise.. I suppose you can add example code in
sefltests for this, but asking for a "proper test" may be
a litte unrealistic here- a proper test needs proper hardware
in this case.

--Sowmini