linux-kernel - Re: nohz problem with idle time on old hardware

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Message-ID: <CAKohponY+4y8G875wy4GsO1hTqERc7-hYKY6uQvLn28+32VxVQ@mail.gmail.com>
Date:	Wed, 9 Apr 2014 20:50:59 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Matthew Whitehead <tedheadster@...il.com>,
	John Stultz <john.stultz@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	mwhitehe@...hat.com
Subject: Re: nohz problem with idle time on old hardware

On 9 April 2014 20:01, Steven Rostedt <rostedt@...dmis.org> wrote:
> Ouch! You are correct, this part of the patch makes no sense. That's
> what I get for reviewing a patch and not looking at all the code around
> the changes. (another kernel developer hangs head in shame :-( )
>
> I think that if statement should be nuked.

Hmm, my opinion differs here :)

If we completely remove this statement, we will run
tick_nohz_switch_to_nohz() even if nohz is not enabled. And check for
enabled must stay.
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