Re: Preemptable kernel (was Scheduling latencies news: less RAM = less latency)
Lieven Marchand (mal@bewoner.dma.be)
Mon, 2 Aug 1999 19:55:32 +0200 (CEST)
yodaiken@chelm.cs.nmt.edu writes:
> On Mon, Aug 02, 1999 at 08:49:01AM +1000, Keith Owens wrote:
> > So it is possible to have a real and complex OS that is preemptable and
> > pageable. Although I have to say that the MVS internals to support
> > kernel preemption and paging are a lot more complex than the current
> > Linux internals.
>
> MVS spends a lot of time running OS algorithms to allow full
> preemption that Linux wastes on running user applications.
>
Last time I looked at it, it got to the point they had moved some
ASSISTs into microcode. IIRC, some manipulations of the process
block. I doubt Intel/Sun/MIPS/IBM is going to accomodate Linux quite
that much ;-)
--
Lieven Marchand <mal@bewoner.dma.be>
If there are aliens, they play Go. -- Lasker
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