Re: [ANNOUNCE] Adeos nanokernel for Linux kernel

Alessandro Rubini
2002-06-03T10:06:08Z

> It still looks to me like a real time operating system
> (Adeos) running real time and non-real time tasks with a general
> purpose operating system as one of the non-real time tasks...

But the point is exactly that adeos is not a real-time operating
system. It is not an operating system at all.

Besides, adeos is not a "circumvention device" to run RT-and-non-RT at
the same time. It's a nano-kernel meant to run several independent OS's
at once, as well as kernel debuggers and a lot of other stuff. Did you
notice Karim is the author and maintainer of the linux trace toolkit?

> Could you summarize (for non-lawyers such as myself) how this
> bypasses the claims in the patent?

I'll quote the patent for you:

A process for [...] providing a general purpose operating system as
one of the non-real time tasks; preempting the general purpose
operating system as needed for the real time tasks; and preventing the
general purpose operating system from blocking preemption of the
non-real time tasks.

Nothing of this is in adeos. And nothing of this will be in the
adeosized RTAI.

/alessandro, living in a swpat-free country (with other problems, though :)