Messages in this thread | | | Date | Tue, 24 May 2005 17:56:19 +0200 | From | Ingo Molnar <> | Subject | Re: RT patch acceptance |
| |
* Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> Well, yes. There are lots of things Linux isn't suited for. There are > likewise a lot of patches that SGI would love to get into the kernel > so it runs better on their 500+ CPU systems. [...]
this reminds me. PREEMPT_RT found a handful of SMP races that not even 100+ CPU systems triggered in any deterministic way.
(I have mentioned this before but it seems worth repeating: the preemption model of PREEMPT_RT is similar to a SMP Linux kernel running on an system that has an 'infinite' number of CPUs. Each task can be thought of having its own separate CPU - and SMP-alike instruction overlap can happen at any instruction boundary.)
So the very small meets (and helps) the very large in interesting ways. PREEMPT_RT very much depends on a good SMP implementation and on a good CONFIG_PREEMPT implementation. The synergies are much wider than just enabling deterministic behavior in embedded systems.
Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |