linux-kernel - Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

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Message-ID: <20100507034554.GB20935@thegnar.org>
Date:	Thu, 6 May 2010 20:45:54 -0700
From:	mgross <markgross@...gnar.org>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Matthew Garrett <mjg@...hat.com>,
	Brian Swetland <swetland@...gle.com>,
	Alan Stern <stern@...land.harvard.edu>,
	mark gross <mgross@...ux.intel.com>, markgross@...gnar.org,
	Len Brown <len.brown@...el.com>, linux-doc@...r.kernel.org,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

On Thu, May 06, 2010 at 10:14:53AM -0700, Tony Lindgren wrote:
> * Matthew Garrett <mjg@...hat.com> [100506 10:05]:
> > On Thu, May 06, 2010 at 10:01:51AM -0700, Tony Lindgren wrote:
> > 
> > > Or are you suspending constantly, tens of times per minute even if
> > > there's no user activity?
> > 
> > In this case you'd be repeatedly trying to suspend until the modem 
> > driver stopped blocking it. It's pretty much a waste.
> 
> But then the userspace knows you're getting data from the modem, and
> it can kick some inactivity timer that determines when to try to
> suspend next.

Thank you for thinking.

--mgross

> 
> Why would you need to constantly try to suspend in that case?
> 
> Regards,
> 
> Tony
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