Dag-Erling Smorgrav scribbled this message on Aug 4:
> "Kelly Yancey" <[EMAIL PROTECTED]> writes:
> > [...]
>
> Which reminds me - has anyone thought of using DMA for zeroing pages,
> to avoid cache invalidation? The idea is to keep a chunk of zeroes on
> disk and DMA it into memory instead of clearing pages "manually". This
> assumes your disk supports DMA, of course.
has anyone looked at using two dma channels tied together to do memory
copies? I haven't studied the DMA specs, but from what I know of the
dma on x86 machines is that you could tie two dma channels together one
to feed the other, and this would allow you to copy memory w/o using the
processor...
w/ dma channels, we can just make a copy of the base zero page...
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