Hi Alex,
> I'm looking for opinions about how direct I/O can be implemented on
> Linux. I am interested in a design that does not touch the
> page-tables of the process, and where the data is DMAed directly to
> user-space visible pages.
[ahem, big snip]
Do the Stephen C Tweedie and SGI raw I/O patches do what you need?
If not, they may help a bit by the sounds of it.
http://oss.sgi.com/projects/rawio/
- Dan
__________________________
Daniel J Blueman
Undergraduate - BSc Computing Science
UMIST university - Manchester
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