Re: Notebook disk spindown

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Andre Hedrick wrote:
> On Sat, 9 Sep 2000 rob@mur.org.uk wrote:
> > Would it be possible to detect when the disk spins up, and do the flush then?
> Yes if you had a continuious polling of power status wrt standby.

I think the following flushing policy would work almost as well, while
remaining generic:

 - if there's a read that is not handled from the buffer cache, flush
   (write) all dirty buffers
 - if we need to flush (write) one dirty buffers, flush all others too

This wouldn't catch cases like an explicit spin-up without data I/O,
but I don't think this is much of a problem in real life.

- Werner

-- 
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 / Werner Almesberger, ICA, EPFL, CH       werner.almesberger@ica.epfl.ch /
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