speeding up ugen by an order of magnitude.

[Poul-Henning Kamp]

In message <20040708093145.GX12877 at cicely12.cicely.de>, Bernd Walter writes:

>Can we do interleaving with physio?

physio is just a way to avoid copyin/copyout.  It maps & pins the
space the user indicated in read(2) or write(2) into the kernel
address space so that the kernel can access it directly.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.