netdev - Re: [PATCH net-next 7/7] selftests/net: add zerocopy support for PF

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Date:   Sun, 28 Jan 2018 14:57:26 -0500
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>, rds-devel@....oracle.com,
        santosh.shilimkar@...cle.com
Subject: Re: [PATCH net-next 7/7] selftests/net: add zerocopy support for
 PF_RDS test case

On (01/28/18 19:39), Willem de Bruijn wrote:
> > But the whole test program is rather simplistic, since it doesnt
> > actually verify the value of the cookies (hopefully me pending
    :
> It might be nice to at least increment the variable on each
> successful send. The test is single threaded anyway. And
> then we can test that the returned values are in the defined
> range.

Yeah one thought that went through my head was that since
I now pick the cookes as consecutive numbers (1..N) anyway,
we could do a very simple-minded checksum on recv_completion
notification to check that the sum of all the cookie values
returned is actually N * (N+1)/2 - and flag errors/warnings
if it is not.. 

this would be a test enhancement I could do later.. first let 
me try to avoid having all this complex timer-triggered code.

--Sowmini