Thread (43 messages) 43 messages, 6 authors, 2009-03-30

Re: [PATCH 06/13] async_tx: add support for asynchronous GF multiplication

From: H. Peter Anvin <hidden>
Date: 2009-03-20 23:41:34
Also in: lkml

Ilya Yanok wrote:
quoted
quoted
That doesn't explain what you expect the code to do.  It still doesn't
make sense to me.
We defined async_pq() function as hardware can do GF multiplication of
arbitrary elements and we want to take advantage of this fact. But by
the design of ASYNC_TX API we have to provide synchronous version of
that function too.
I don't think that makes sense since the algorithm doesn't use 
vector-vector multiplications and there is no need for them.  As such, 
you're actively excluding support for hardware which only provides 
scalar-vector multiplication, even though that is all we need.

In fact, vectorizing the constant doesn't make much sense.

	-hpa
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