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SubjectRe: 2.1.111: IDE DMA disabled?
Mark Lord wrote:

> That's from the IDE (ATA) specs. 18" max.
>
> The timings with DMA are *identical* to the timings with PIO,
> so if it fails with DMA, it will fail with PIO as well.
>
> Removing DMA from the kernel solves nothing there.

As per Linus' comment in another email, it does make a difference, it not in
the cable timings, then in other timings relating to the transfer. Probably
not the least of which is memory congestion. In any case, it does make a
difference.
--

Doug Ledford <dledford@dialnet.net>
Opinions expressed are my own, but
they should be everybody's.

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