Re: [PATCH v2] sched/fair: Age the average idle time

[Peter Zijlstra]

On Tue, Jun 15, 2021 at 12:16:11PM +0100, Mel Gorman wrote:
> From: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> 
> This is a partial forward-port of Peter Ziljstra's work first posted
> at https://lore.kernel.org/lkml/20180530142236.667774973@xxxxxxxxxxxxx/.

It's patches 2 and 3 together, right?

> His Signed-off has been removed because it is modified but will be restored
> if he says it's still ok.

I suppose the SoB will auto-magically re-appear if I apply it :-)

> The patch potentially matters when a socket was multiple LLCs as the
> maximum search depth is lower. However, some of the test results were
> suspiciously good (e.g. specjbb2005 gaining 50% on a Zen1 machine) and
> other results were not dramatically different to other mcahines.
> 
> Given the nature of the patch, Peter's full series is not being forward
> ported as each part should stand on its own. Preferably they would be
> merged at different times to reduce the risk of false bisections.

I'm tempted to give it a go.. anyone object?