From: Nigel Cunningham <nigel@nigel.suspend2.net>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump
Date: Fri, 21 Sep 2007 22:15:54 +1000
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Cc: Andrew Morton <akpm@linux-foundation.org>, nigel@suspend2.net,
       Pavel Machek <pavel@ucw.cz>, "Huang, Ying" <ying.huang@intel.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Jeremy Maitin-Shepard <jbms@cmu.edu>, linux-kernel@vger.kernel.org,
       linux-pm@lists.linux-foundation.org,
       Kexec Mailing List <kexec@lists.infradead.org>,
       Len Brown <lenb@kernel.org>
References: <1190266447.21818.17.camel@caritas-dev.intel.com> <200709212158.50538.nigel@nigel.suspend2.net> <200709211418.20358.rjw@sisk.pl>
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Hi.

On Friday 21 September 2007 22:18:19 Rafael J. Wysocki wrote:
> On Friday, 21 September 2007 13:58, Nigel Cunningham wrote:
> > Hi.
> > 
> > On Friday 21 September 2007 21:56:29 Rafael J. Wysocki wrote:
> > > [Besides, the current hibernation userland interface is used by default 
by
> > > openSUSE and it's also used by quite some Debian users, so we can't drop
> > > it overnight and it can't be implemented in a compatible way on top of 
the
> > > kexec-based solution.]
> > 
> > Could it be fudged by giving userland a null image and having (say) the 
first 
> > ioctl be one that triggers all the real work (with other ioctls being 
noops 
> > or such like, as appropriate)?
> 
> Well, the "suspend" part is probably doable, but I'm afraid of the "resume"
> one.

'k. I've occasionally thought about trying it, but haven't ever gotten around 
to actually doing it yet. (I'd like to make TuxOnIce transparently replace 
both swsusp and uswsusp if I could).

Regards,

Nigel
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