Re: [RFC][PATCH 00/26] sched/numa

Christoph Lameter
2012-03-19T20:43:18Z

On Mon, 19 Mar 2012, Ingo Molnar wrote:

> > I wonder how we can verify that the automatic migration
> > schemes are a real benefit to the application? We have a
> > history of developing a kernel that decreases in performance
> > as development proceeds. How can we make sure that these
> > schemes are actually beneficial overall for all loads and do
> > not cause regressions elsewhere? [...]
>
> The usual way?

Which is merge after a couple of benchmarks and then deal with the
regressions for a couple of years?

Patch verification occurs in an artificial bubble of software run/known by
kernel developers. It can take years before the code is exposed to
real life situations.