linux-kernel - Re: [PATCH 4/4] sched,time: only call account_{user,sys,guest,idle}

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Message-ID: <1454356843.7627.187.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 01 Feb 2016 12:00:43 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	riel@...hat.com
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	peterz@...radead.org, fweisbec@...il.com, clark@...hat.com,
	luto@...capital.net, mingo@...nel.org
Subject: Re: [PATCH 4/4] sched,time: only call
 account_{user,sys,guest,idle}_time once a jiffy

On Mon, 2016-02-01 at 14:21 -0500, riel@...hat.com wrote:
> From: Rik van Riel <riel@...hat.com>
> 

>  #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
> +static bool vtime_jiffies_changed(struct task_struct *tsk, unsigned long now)
> +{
> +	if (tsk->vtime_jiffies == jiffies)
> +		return false;
> +
> +	tsk->vtime_jiffies = jiffies;
> +	return true;
> +}

I am guessing you intended to use 'now' instead of jiffies ?