linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

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Date:	Wed, 2 Jun 2010 09:21:52 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Arve Hjønnevåg <arve@...roid.com>
cc:	James Bottomley <James.Bottomley@...e.de>,
	Peter Zijlstra <peterz@...radead.org>, tytso@....edu,
	LKML <linux-kernel@...r.kernel.org>,
	Florian Mickler <florian@...kler.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	felipe.balbi@...ia.com, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

On Wed, 2 Jun 2010, Arve Hjønnevåg wrote:
> 2010/6/2 Thomas Gleixner <tglx@...utronix.de>:
> > On Tue, 1 Jun 2010, Arve Hjønnevåg wrote:
> >> Deferring the the timers forever without stopping the clock can cause
> >> problems. Our user space code has a lot of timeouts that will trigger
> >> an error if an app does not respond in time. Freezing everything and
> >> stopping the clock while suspended is a lot simpler than trying to
> >> stop individual timers and processes from running.
> >
> > And resume updates timekeeping to account for the slept time. So the
> 
> No, for the monotonic clock it does the opposite. The hardware clock
> is read on resume and the offset is set so the monotonic clock gets
> the same value as it had when suspend was called.

Grr, yes. Misread the code. -ENOTENOUGHCOFFEE

Thanks,

	tglx