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

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Message-ID: <20100506171453.GC30928@atomide.com>
Date:	Thu, 6 May 2010 10:14:53 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	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.

* 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.

Why would you need to constantly try to suspend in that case?

Regards,

Tony
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