linux-kernel - Re: [RFC] what should 'uptime' be on suspend?

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Date:	Fri, 20 Jul 2007 10:42:15 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Ken Moffat <zarniwhoop@...world.com>
Cc:	Bill Davidsen <davidsen@....com>,
	Linux Kernel M/L <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] what should 'uptime' be on suspend?

On Fri, 20 Jul 2007 18:17:29 +0100 Ken Moffat wrote:

> On Thu, Jul 19, 2007 at 10:42:22PM -0400, Bill Davidsen wrote:
> > I just found a machine which will resume after suspend to memory, using 
> > the mainline kernel (no suspend2 patch).
> > 
> > On resume I was looking at the uptime output, and it was about six 
> > minutes, FAR longer than the time since resume. So the topic for 
> > discussion is, should the uptime be
> > - time sine the original boot
> > - total uptime since first boot, not counting the time suspended
> > - time since resume
> > - some other time around six minutes
> > 
> > Any of the first three could be useful and "right" for some casesm thus 
> > discussion invited.
> > 
>  My ibook has always been able to suspend to RAM.  For a long while,
> uptime was shown as the time since the last boot.  At some point,
> maybe about a year ago, this was "corrected" to show time since boot
> _less_ time suspended.
> 
>  To be clear, the ibook suspends when I close the lid and resumes
> when I open it.  Uptime used to be convenient, because I could work
> out when I'd last booted.

man uptime:
	uptime - tell how long the system has been running

I claim that the system is not running when it is suspended,
so the suspension time should not be included in uptime.


---
~Randy
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