Date: Mon, 4 Aug 2008 13:01:00 +0200
From: Pavel Machek <pavel@suse.cz>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>,
       Andrew Morton <akpm@linux-foundation.org>,
       Huang Ying <ying.huang@intel.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       "Rafael J. Wysocki" <rjw@sisk.pl>, linux-kernel@vger.kernel.org,
       linux-pm@lists.linux-foundation.org,
       Kexec Mailing List <kexec@lists.infradead.org>,
       Horms <horms@verge.net.au>
Subject: Re: [PATCH -mm 1/2] kexec jump -v12: kexec jump
Message-ID: <20080804110100.GF12341@atrey.karlin.mff.cuni.cz>
References: <1215401122.4660.4.camel@caritas-dev.intel.com> <20080708145051.GA14745@redhat.com> <20080711122131.b6461ab1.akpm@linux-foundation.org> <20080711201149.GB3298@redhat.com> <1215824537.7319.7.camel@nigel-laptop> <20080714054644.GC20258@elf.ucw.cz> <20080714133221.GC16673@redhat.com>
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> On Mon, Jul 14, 2008 at 07:46:44AM +0200, Pavel Machek wrote:
> > On Sat 2008-07-12 11:02:17, Nigel Cunningham wrote:
> > > Hi.
> > > 
> > > On Fri, 2008-07-11 at 16:11 -0400, Vivek Goyal wrote:
> > > > Hi Andrew,
> > > > 
> > > > We can use this patchset for hibernation, but can it be a better way of doing
> > > > things than what we already have, I don't know. Last time I had raised
> > > > this question and power people had various views. In the end, Pavel wanted
> > > > this patchset to be in.  Pavel, can tell more here...
> > > > 
> > > > To me this patchset looks interesting for couple of reasons.
> > > > 
> > > > - Looks like an interesting feature where one can have a separate kernel
> > > >   in memory and one can switch between the kernels on the fly. It can
> > > >   be modified to have more than one kernel in memory at a time.
> > > 
> > > I'm not sure how useful that would be, though. I already have
> > > functionality in TuxOnIce which allows you to resume a different image
> > > instead of powering off (roughly the same thing when combined with not
> > > removing the image after resuming). It was neat when testing to be
> > > able
> > 
> > Beaty of kjump is that it is supposed to used on half-broken system,
> > so it is useful for debugging.
> > 
> 
> What do you mean by supposed to be used on half-broken system?

Maybe some network driver went wrong (but rest of machine keeps
working), so you want to do kdump but do not want to kill the machine
(as the remaining network drivers make the server useful).
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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