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From(Alan Cox)
SubjectRe: PATCH: Raw device IO for 2.1.131
DateSun, 13 Dec 1998 20:00:37 +0000 (GMT)
> I think it's perfectly correct in this case to use mlock(), but the goal
> is not to pin down pages as a basic mechanizm, but to guarantee bandwith.
> (i assume the capture card can do at least page granularity scatter-gather
> DMA?)

Yes. It can do that page level.

> (since it's video-capture, mlock() should not be much of an issue, the
> card is a controlled resource anyway. If in the future we will have video

His torvaldsness rejected a patch that made mlock callable from inside drivers
to do this sort of stuff. So thats not a possibility.

Alan


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