Re: CONFIG_BIGMEM and rawio

Manfred Spraul (manfreds@colorfullife.com)
Fri, 03 Sep 1999 01:24:02 +0200

Alan Cox wrote:
> Transparently using bounce buffers would be an even better idea.

But OTHO, if you buy 4 GB memory you want good performance. If you use
raw-io, then you need good IO performance, so you would buy a
DMA-controller.

Basically, I'm sure that 99.9% of the bounce buffer cases would be on
developer machines, noone would use such an installation for production.

I think it would be acceptable to say "if you want > 2 GB memory and
raw-io, then you must buy a DMA controller."

The only problem I currently see is software RAID-5.

--
	Manfred


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