linux-kernel - Re: [patch v3.18+ regression fix] sched: Further improve spurious CPU

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Message-ID: <1472711826.3979.78.camel@gmail.com>
Date:   Thu, 01 Sep 2016 08:37:06 +0200
From:   Mike Galbraith <umgwanakikbuti@...il.com>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Rik van Riel <riel@...hat.com>
Subject: Re: [patch v3.18+ regression fix] sched: Further improve spurious
 CPU_IDLE active migrations

On Thu, 2016-09-01 at 06:11 +0200, Mike Galbraith wrote:

> I don't see a great alternative to turning it off off the top of my
> head, at least for processors with multiple LLCs.

Here of course I mean other than saying it's just not worth worrying
about such old processors, iff it's only old dogs that are affected. 

Ignore it, they're dinosaurs is a valid option.  I really doubt there
are oodles of such boxen in active use out in the real world.. if there
were, surely there would be gripes, which afaik has not happened.

	-Mike