linux-kernel - Re: [PATCH] sched/nohz: add debugfs control over sched_tick_max

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Message-ID: <CAMAWPa-WMkb_rJZ_XBCd3+pTtu5-SwN7F-0pNs3SrsokDDH5sA@mail.gmail.com>
Date:	Fri, 26 Sep 2014 13:03:26 -0700
From:	Kevin Hilman <khilman@...nel.org>
To:	Kevin Hilman <khilman@...nel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	Kevin Hilman <khilman@...aro.org>
Subject: Re: [PATCH] sched/nohz: add debugfs control over sched_tick_max_deferment

Hi Frederic,

On Fri, Sep 26, 2014 at 12:45 PM, Kevin Hilman <khilman@...nel.org> wrote:
> From: Kevin Hilman <khilman@...aro.org>
>
> Allow debugfs override of sched_tick_max_deferment in order to ease
> finding/fixing the remaining issues with full nohz.
>
> The value to be written is in jiffies, and -1 means the max deferment
> is disabled (scheduler_tick_max_deferment() returns KTIME_MAX.)
>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Signed-off-by: Kevin Hilman <khilman@...aro.org>

This is just an attempt to revive and hopefully finalize the
discussion started a while back[1].

Kevin

[1] https://lkml.org/lkml/2014/1/14/914
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