linux-kernel - Re: [PATCH] sched: update_rq_clock() must skip ONE update

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Message-ID: <20140331232631.0021ba8c@gandalf.local.home>
Date:	Mon, 31 Mar 2014 23:26:31 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: update_rq_clock() must skip ONE update

On Tue, 01 Apr 2014 05:10:14 +0200
Mike Galbraith <umgwanakikbuti@...il.com> wrote:
> Maybe it should just die as more potential trouble than it's worth.  It
> has saved a pile of fastpath cycles, losing those again would be a
> shame.  Accounting doesn't need to be perfect (is the enemy of good),
> but it does need to be a guaranteed good.

I don't think we should get rid of it. But better comments in the
scheduler would be nice.

-- Steve
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