Linus Torvalds wrote:
> - I think the microkernel approach is fundamentally broken. Karim claims
> there is no priority inversion, but he must have his blinders on. Every
> single spinlock in the kernel assumes that the kernel isn't preempted,
> which means that user apps that can preempt the kernel cannot use them.
Blinders ehh... Well, if you would care to ask I would answer.
In reality, what you point out is actually a non-issue since the hard-rt
user-land tasks are not allowed to call on normal Linux services. They
can only call on RTAI services which are exported by an extra soft-int.
These services are hard-rt, so there's no problem there.
Please, download the thing and play with it. Or, at the very least, ask
about how it works and we'll be glad to explain.
Karim
===================================================
Karim Yaghmour
karim@opersys.com
Embedded and Real-Time Linux Expert
===================================================
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This archive was generated by hypermail 2b29 : Fri May 31 2002 - 22:00:16 EST