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SubjectRe: IDE-DVD problems [excuse former idiotic topic]
On Wed, Sep 04, 2002 at 08:48:00AM -0700, Joseph N. Hall wrote:
> * Performance is terrible
> * booting with noapic makes no difference
> * Performance seems to indicate some kind of difficulties in
> the kernel, perhaps connected to interrupt handling

That's what happens when DMA isn't being used: the kernel spends lots of
time copying data from the drive in the interrupt handler and not allowing
userspace to execute.

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