> They are ALREADY being put into practice look at XNU it is a Mach
> implementation supported and being used by Apple, even Sun is using a
> Mach variant(even though you may not awareness of the same, nor
> bothered to make your self aware). And irrespective of FUD said by
> other people, i DO have hope for HURD and Coyotos.
AFAIK pure microkernels have not found favour with commercially
popular OSes (including FOSS alternatives). Apple's XNU is hybrid, not
a pure microkernel
You miss the point of reply.
A certain person was blabbing FUD about AST and callously dismissing
his work as ``theories" and conveniently also dismissing the very
ideas and research put forth by researchers all over the world as
having no practical merit as a working practical implementation is
there. Well if we all had that attitude we'd still be in the stone
age.
If there's one thing i have learned over a priod of time - NEVER
dismiss an idea.
By the DAJ, since you did not reply to my point about AST's books let
me give you a little something from one of them :
``In bilogy, extinction is forever, but in computer science, it is
sometimes only for a few years.....
...Early operating systems allocated files on the disk by placing them
in contiguous sectors, one after another. Although this scheme was
easy to implement, it was not too flexible because when a file grew,
there was not enough room to store it any more. Thus the concept of
contiguously allocated files was discarded as obsolete. Until CD-ROM's
came around. There was a problem of growing files did not exist. All
of a sudden, the simplicity of contiguous file allocation was seen as
a great idea and CD-ROM file systems are now based on it...."
Also, the Solaris kernel is monolithic:
http://en.wikipedia.org/wiki/Solaris_%28operating_system%29
My dear Sir, NO WHERE in my reply have i said that that Solaris is a
mirco kernel. What i did say was : ``even Sun is using a Mach variant"
:
http://en.wikipedia.org/wiki/OpenStep
> A design that only solves short term problems eventually dies and
> takes all dependent on it to the grave.
AFAIK, the main reason Linux (and other commercially used OS kernels)
stay away from pure microkernels is speed. The microkernel design
doesn't optimize for speed, it does so for clarity in design.
Monolithic (and hybrid) kernels optimize for speed while at the same
time, having sufficiently clear design.
and is that a reason to dismiss the very idea of Mircro kernels itself
? Again to quote AST ````In bilogy, extinction is forever, but in
computer science, it is sometimes only for a few years".
Regards,
- vihan
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