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

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Message-ID: <20100507192837.GM387@atomide.com>
Date:	Fri, 7 May 2010 12:28:37 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Daniel Walker <dwalker@...o99.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.

* Daniel Walker <dwalker@...o99.com> [100507 12:01]:
> On Fri, 2010-05-07 at 19:46 +0100, Matthew Garrett wrote:
> > On Fri, May 07, 2010 at 11:43:33AM -0700, Tony Lindgren wrote:
> > > * Matthew Garrett <mjg@...hat.com> [100507 11:23]:
> > > > On Fri, May 07, 2010 at 11:01:52AM -0700, Tony Lindgren wrote:
> > > > > * Matthew Garrett <mjg@...hat.com> [100507 10:46]:
> > > > > > Effective power management in the face of real-world applications is a 
> > > > > > reasonable usecase.
> > > > > 
> > > > > Sure there's no easy solution to misbehaving apps.
> > > > 
> > > > That's the point of the suspend blockers.
> > > 
> > > To me it sounds like suspending the whole system to deal with
> > > some misbehaving apps is an overkill. Sounds like kill -STOP
> > > the misbehaving apps should do the trick?
> > 
> > Freezer cgroups would work better, but it doesn't really change the 
> > point - if that application has an open network socket, how do you know 
> > to resume that application when a packet comes in?

No idea, but that still sounds a better situation to me than
trying to deal with that for a suspended system! :)
 
> suspend blockers can get abused also .. I had my phone in my pocket and
> accidentally ran "Google Talk" or something. It must have kept the
> screen on or kept the phone from suspending, so the battery drained
> completely over the course of an hour or so.

Yeah I guess there's nothing stopping that.

Tony

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