linux-kernel - Re: [2.6.21.1] resume doesn't run suspended kernel?

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Message-Id: <1180441438.20718.1.camel@nigel.suspend2.net>
Date:	Tue, 29 May 2007 22:23:58 +1000
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Pavel Machek <pavel@....cz>, Bill Davidsen <davidsen@....com>,
	Linux Kernel M/L <linux-kernel@...r.kernel.org>
Subject: Re: [2.6.21.1] resume doesn't run suspended kernel?

Hi.

On Tue, 2007-05-29 at 14:03 +0200, Rafael J. Wysocki wrote:
> On Tuesday, 29 May 2007 13:29, Pavel Machek wrote:
> > Hi!
> > 
> > > > Yup.  Don't we do something like this for the (ACPI-based) suspend to RAM
> > > > already?
> > > 
> > > Yeah, I was thinking about this overnight too. It should be doable. In
> > > addition to what we already do, I think you'd want:
> > > 
> > > - to copy the assembly to do the copying to a safe page;
> > > - to put the location of the cpu state that was saved in the image
> > > header so that it can be used after the data is copied back;
> > 
> > ...alternatively, we can just rely on copy routine (and its data) not
> > changing frequently.

I'd rather be sure. It will be extra code, but reliability is important.

> > > - to copy the nosave data to a 'safe' page.
> > > 
> > > What else?
> > 
> > page directories need to be on a safe place, too.
> 
> They are already.

Yeah - that's why I ignored them.

Regards,

Nigel

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