[next-20200621] LTP tests af_alg02/05 failure on POWER9 PowerVM LPAR

[Herbert Xu]

On Mon, Jun 22, 2020 at 05:55:29PM +0530, Sachin Sant wrote:
> With recent next(next-20200621) af_alg02/05 tests fail while running on POWER9
> PowerVM LPAR.
> 
> Results from  5.8.0-rc1-next-20200622
> # ./af_alg02
> tst_test.c:1096: INFO: Timeout per run is 0h 00m 20s
> af_alg02.c:52: BROK: Timed out while reading from request socket.
> #
> 
> 5.8.0-rc1-next-20200618 was good. The test case ran fine.
> 
> Root cause analysis point to following commit:
> 
> commit f3c802a1f30013f8f723b62d7fa49eb9e991da23
>     crypto: algif_aead - Only wake up when ctx->more is zero
> 
> Reverting this commit allows the test to PASS.

Yes that commit does change the behaviour if you don't terminate
your AEAD request by clearing the MSG_MORE flag.  AEAD does not
support chaining so each request must be sent in full before it
can be processed through recvmsg(2).  Setting the MSG_MORE flag
indicates that your request has not been sent in full.

Cheers,
-- 
Email: Herbert Xu <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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