linux-kernel - Re: [PATCH 2/4] sched/fair: Introduce idle enter/exit balance callbacks

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Message-ID: <20160621081202.GO30909@twins.programming.kicks-ass.net>
Date:	Tue, 21 Jun 2016 10:12:02 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	James Hartsock <hartsjc@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Kirill Tkhai <ktkhai@...allels.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 2/4] sched/fair: Introduce idle enter/exit balance
 callbacks

On Mon, Jun 20, 2016 at 06:27:41PM +0200, Jiri Olsa wrote:
> so it might not be that easy to switch it to use the easy
> change I added as part of this RFC, but AFAIU it should be
> the same idle mask, but this approach might be too naive
> and miss some idle enter/exit paths.. CC-ing Frederic

Right, for RFC this will do; but I really want to avoid adding another
global atomic bitmask on the idle path.

In any case, I'll go look over the actual patches sometime soon, I still
got a few other patches series to stare at first.