On Wed, Sep 23, 2015 at 02:40:32PM +0000, Porosanu Alexandru wrote:
> 
> Yes, you are absolutely right. In this case, I have some reasons why I 
> wouldn't like to use a crypto_queue based approach:
> 
> 1) we've prototyped a crypto_queue implementation which did not reach the 
> performance expectations due to CPU overhead;

I'm not saying that you should always use a software queue.  The
queue is only needed when your hardware queue is full.  You can
make it zero-length for requests that are not MAY_BACKLOG, i.e.,
only MAY_BACKLOG requests need to be queued, everything else can
just be dropped when the hw queue is full.

If you do that I don't see why the performance should be any
different.

Cheers,
-- 
Email: Herbert Xu <herb...@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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