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SubjectRe: It hurts when I shoot myself in the foot
On Fri, 2002-05-24 at 10:36, Kasper Dupont wrote:
> Alan Cox wrote:
> >
> > > If the kernel knew multipliers couldn't it actually use the TSCs
> > > anyway? Of course it would take some work, but is there any
> > > reason why it would not be posible?
> >
> > In 2.4 yes. In 2.5 it would be close to impossible due to the pre-empt code
> Couldn't that be solved in one of the following ways?
> 1) Disable pre-emption while reading TSC and CPU nr.
> 2) Use affinity for processes pre-empted in kernel mode.
> 3) Disable pre-emption for SMP systems.
Sorry to chime in on this if it isn't appreciated, but wouldn't #3 open
some old wounds again? It seems that it would FMPOV.


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