Re: [PATCH] O6int for interactivity

Mike Galbraith
2003-07-18T18:31:22Z

At 09:52 AM 7/18/2003 -0700, Davide Libenzi wrote:
>On Fri, 18 Jul 2003, Mike Galbraith wrote:
>
> > Telling to not mess with my kernel threads seems to have fixed it here...
> > no stalls during the whole contest run. New contest numbers attached.
>
>It is ok to use unfairness towards kernel threads to avoid starvation. We
>control them. It is right to apply uncontrolled unfairness to userspace
>tasks though.

In this case, it appears that the lowered priority was causing
trouble. One test run isn't enough to say 100%, but what I read out of the
numbers is that at least kswapd needs to be able to preempt.

wrt the uncontrolled unfairness, I've muttered about this before. I've
also tried (quite) a few things, but nothing yet has been good enough to...
require trashing that I couldn't do here ;-)

-Mike