Re: [PATCH] sched/fair: util_est: fast ramp-up EWMA on utilization increases

From: Peter Zijlstra
Date: Mon Oct 14 2019 - 10:52:24 EST

The energy aware schedutil patches remimded me this was still pending.

On Fri, Aug 02, 2019 at 10:47:25AM +0100, Patrick Bellasi wrote:
> Hi Peter, Vincent,
> is there anything different I can do on this?

I think both Vincent and me are basically fine with the patch, it was
the Changelog/explanation for it that sat uneasy.

Specifically I think the 'confusion' around the PELT invariance stuff
doesn't help.

I think that if you present it simply as making util_est directly follow
upward motion and only decay on downward -- and the rationale for it --
then it should be fine.