linux-kernel - Re: No warning on resume with different kernel version

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Message-Id: <200903162253.55940.rjw@sisk.pl>
Date:	Mon, 16 Mar 2009 22:53:55 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>, Rolf Eike Beer <eike-kernel@...tec.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: No warning on resume with different kernel version

On Monday 16 March 2009, Pavel Machek wrote:
> On Mon 2009-03-16 21:33:10, Rafael J. Wysocki wrote:
> > On Monday 16 March 2009, Pavel Machek wrote:
> > > On Sat 2009-03-14 16:28:59, Rolf Eike Beer wrote:
> > > > Hi,
> > > > 
> > > > I'm sure this had worked before. And since I don't do that on a regular basis, 
> > > > but only by accident, I have no idea when it stopped working. But with my 
> > > > 2.6.28 kernel and everything more recent I don't get a warning if there is a 
> > > > suspend image of a different kernel version, but simply the new kernel starts 
> > > > and throws everything away. Is this a kernel fault or something with the 
> > > > userspace stuff? Whom to blame for this?
> > > 
> > > Actually, it should now be possible to resume with different kernel
> > > than the one that did the suspendding...
> > 
> > As long as it is 64-bit.
> > 
> > Something broke if that doesn't work.
> > 
> > Rolf, is your kernel 64-bit?
> 
> And in 32-bit case, we should refuse to load the image. Something
> broke if that does not work :-).

Well, the description suggests the boot kernel didn't load the image, but
just continued to boot.  That really depends on what "throws everything away"
means in the original report.  Rolf?

Rafael
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