Re: [GIT PULL] scheduler changes for v5.5

From: Linus Torvalds
Date: Tue Nov 26 2019 - 18:31:07 EST

On Mon, Nov 25, 2019 at 4:59 AM Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> As such it's not really an iterative series, but replaces the old
> load-balancing logic with the new one. We hope there are no performance
> regressions left - but statistically it's highly probable that there *is*
> going to be some workload that is hurting from these chnages. If so then
> we'd prefer to have a look at that workload and fix its scheduling,
> instead of reverting the changes.

We may not have that opportunity. A lot of loads are various private
loads and you'll just get "this regressed by a huge amount".

So please do keep in mind that reverting this may be the only
reasonable model if it turns out to have bad effects.