Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: Calculating kernel logical address .. | Date | Mon, 9 Sep 2002 20:17:32 +0200 |
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On Monday 09 September 2002 20:00, Richard B. Johnson wrote: > For some reason, (claimed performance reasons) user-mode code > has to be able to get data directly from hardware with no > intervening copy operation. I think any claimed advantage goes > away when you look at the overhead necessary for user-mode > code to sleep before, and awaken after, the DMA operation but > often marketing departments make those decisions.
Pfft. Try turning off ide dma and see what happens.
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