linux-kernel - Re: [PATCH] move get_idle_time , get_iowait

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Message-ID: <20111223133956.GC26157@tiehlicka.suse.cz>
Date:	Fri, 23 Dec 2011 14:39:56 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Glauber Costa <glommer@...allels.com>
Cc:	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	pjt@...gle.com, devel@...nvz.org, Dave Jones <davej@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] move get_idle_time , get_iowait_time to sched/core.c

On Fri 23-12-11 14:08:09, Glauber Costa wrote:
> On 12/12/2011 01:31 PM, Glauber Costa wrote:
> >In commit a25cac5198 we changed the way we calculate idle and iowait
> >for /proc/stat displaying purposes. However, this same information
> >is also displayed in /proc/uptime. These values can now be inconsistent.
> >
> >So I propose we draw both idle values from the same place. In theory,
> >we only need to do it for get_idle_time(). get_iowait_time() is moved
> >as well for consistency only.
> >
> >I moved the functions to sched/core.c so it can live among its other
> >friends like nr_iowait(), etc.
> >
> 
> You guys have any opinions on this ?
> I see that Michal got another fix for this in stat.c already, so I'd
> have to respin this one anyway. Just let me know if this is wanted

The last follow up fix is in Andrew's tree at the moment: procfs: do not
confuse jiffies with cputime64_t.

I don't mind moving those functions outside stat.c if it is reused.
-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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