Re: a joint letter on low latency and Linux

[Linus Torvalds]

On Fri, 30 Jun 2000, Benno Senoner wrote:
> 
> I may miss something, but Ingo's initial low latency patch, did just 
> the schedule checks in the uaccess macros, but that was not enough to
> cover all cases and ensure flat latency diagrams under all kinds of load.

And that is exactly my point.

I refuse to have a kernel that is bogged down with random crap all over
the place. It's wrong. It's distasteful. And it leads to more and more
crap over time. That's how you get a BAD operating system.

Your assumption that "Why can't we just do this ugly thing" is inherently
flawed. The reason we can't do that ugly thing is also the reason that
people want to use Linux in the first place. Otherwise you might as well
run Windows or something else.

If it cannot be handled with just a few well-placed things, then it
shouldn't be handled at all, and you should be working on trying to make
the UP-threaded kernel work ok, so that for the 2.5.x timeframe we won't
have this issue any more.

Live with it.

		Linus