Quoting Manuel Bouyer <bouyer@antioche.eu.org>:

> On Sat, Jan 21, 2006 at 01:04:06PM +1100, James Haggerty wrote:
> >
> > Still no improvement with diff1, diff2 reports 'Drive flags 0x51', so
> yes,
> > that bit is set.
>
> OK, so DMA is probably used, but the controller or the drive can't
> run fast.
> Could you run the test program with a large number, and check the
> system and interrupt CPU usage with top or systat vm ?
>
> Anyway I'm going to commit the patch, as at last it prevents the panic.
>

Using systat vm, Sy hovers around 1.0 to 1.4%; In goes from 0.0 to 0.4%.




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