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SubjectRe: PS/2 mouse latency was Re: [linux-audio-dev] Re: [DATAPOINT] kernels and latencies
On Wed, Jul 05, 2000 at 12:14:09PM +1000, Andrew Morton wrote:
> [ pruned Cc: list ]
>
> Richard Gooch wrote:
> >
> > Which leads to my other question: can we "ignore" the interrupt
> > (i.e. just update a flag somewhere) for later processing in a process
> > context?
> >
> > Or can we block the interrupt? And hope no-one else is sharing it...
> >
> > Or do you have some other scheme in mind?
>
> How important is this anyway? Does the PS/2 mouse get written to
> regularly, or just at initialisation/reconfiguration time?
>
> In fact, what's the point in writing to a mouse? Does it make it move
> across your desk?

The PS/2 mouse interface has an incestuous relation to the keyboard
controller; they use the same registers. Keyboard controller is writen
to regularly in the keyboard interrupt when you press a key. Both
have to be serialized.


-Andi

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