>>>>> On Thu, 30 Apr 2009 10:01:28 +0200,
[hidden email] said:
XL> Hi,
XL> In Gernot Heiser's lectures, I found a slide showing a root server and references to a root task.
XL> Are these parts no more in OKL4 3?
XL> Otherwise, what are these root stuffs? is the root task simply the first task created by OKL4? And what is the purpose of the root server?
As the slides say (Week 1, p27) these slides describe OKL4 version
2.1, which is what was used for last year's offering of the COMP9242
course. The very next slide indicates that the concept of a
(privileged) root task was removed in the following (non-public)
release.
The next (and latest) public release (3.0) is described in the slide
set linked ("Overview of the OKL4 3.0 API") from the OKL4 developer
wiki (
http://okl4.org). In the first few pages it contains a summary
of changes with respect to earlier versions, and changes to earlier
versions are highlighted throughout. It specifically lists the concept
of a root task as having been removed (and replaced by
capability-mediated authority).
Gernot
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