"Brian Gupta" <[EMAIL PROTECTED]> wrote:
> > using Jaluna code plus OpenSolaris code (for an approximation of SVR4 e.g.
> > filesystem and other code) as a starting point; seems to me that
> > Chorus/MiX would have been on a level of coolness approximating that
> > of HURD, Apollo Domain/OS (had it ever been open sourced), Spring (ditto),
> > or the like.
> >
> > Of course, some would say that the microkernel is semi-dead, given the
> > message passing overhead (or whatever the fully clueful version of that
> > argument is). But the level of flexibility, extensibility, and in some
> > multi-server implementations, ability to recover from even driver or
> > filesystem errors without crashing, IMO remains interesting.
>
>
> Microkernel design philosophy is resurrecting itself in surprising places.
> Take a look at the work the Linux folk are doing to implement ZFS in
> userspace.
Please do not confuse microkernel with multi-context kernels.
Solaris _is_ a microkernel architecture and not a monolith.
Solaris does however run al the code in a single kernel context.
I would guess that in future some of the functionality will be in userland
even on a traditional single-context kernel like Solaris. This is already
true for CD/DVD/BluRay writing (see cdrecord and the SCSI Pass through
driver that I invented in August 1986), it is also true for libusb and
the future Bluetooth stack.
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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