linux-kernel - Re: FW: [linux-pm] select with timeout across S3

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Message-ID: <739522.18279.qm@web50606.mail.re2.yahoo.com>
Date:	Fri, 12 Sep 2008 08:29:51 -0700 (PDT)
From:	marty <martyleisner@...oo.com>
To:	"Leisner, Martin" <Martin.Leisner@...ox.com>,
	Pavel Machek <pavel@...e.cz>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: FW: [linux-pm] select with timeout across S3

I don't see a behavior change in the current kernels.

Select(2) timeouts only count the time the machine is up -- not sleeping...

I had a patch for 2.6.20 that I tried (it modified schedule_timeout) -- 
it didn't do anything useful in 2.6.27-rc5.

marty


--- On Thu, 9/11/08, Pavel Machek <pavel@...e.cz> wrote:

> From: Pavel Machek <pavel@...e.cz>
> Subject: Re: FW: [linux-pm] select with timeout across S3
> To: "Leisner, Martin" <Martin.Leisner@...ox.com>
> Cc: linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org, martyleisner@...oo.com
> Date: Thursday, September 11, 2008, 5:24 AM
> On Thu 2008-09-11 02:17:10, Leisner, Martin wrote:
> > Hi,
> > 
> > I finally got 2.6.27-rc5 running...no change in my
> test program...
> > 
> > I'm going to look at the patches we're using
> for 2.4.20/2.6.20...
> 
> So the bug is still there, or did 2.6.27-rc5 magically
> solve the problem?
> 
> > marty
> > 
> > 
> > -----Original Message-----
> > From: Pavel Machek [mailto:pavel@...e.cz]
> > Sent: Mon 9/1/2008 2:25 AM
> > To: Leisner, Martin
> > Cc: linux-kernel@...r.kernel.org;
> linux-pm@...ts.linux-foundation.org
> > Subject: Re: FW: [linux-pm] select with timeout across
> S3
> >  
> > Hi!
> > 
> > > The behavior of linux (in both 2.4.x and 2.6.x)
> is when the processor
> > > sleeps, timeouts on select don't take into
> account the sleep time,
> > > only the run time.
> > > 
> > > For example, this program should pause for 10
> minutes -- however
> > > if we go into S3 in the middle its pausing for
> (10 minutes + time in
> > > S3)
> > > 
> > > I saw this on both 2.6.20 and 2.6.22...
> > 
> > Can you test this on 2.6.27-rc? We did have some fixes
> in that
> > area....
> > 
> > 							Pavel
> > 
> 
> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures)
> http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


      
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