linux-kernel - Re: [RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump

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Message-ID: <20070921094908.GB20149@elf.ucw.cz>
Date:	Fri, 21 Sep 2007 11:49:08 +0200
From:	Pavel Machek <pavel@....cz>
To:	nigel@...pend2.net
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeremy Maitin-Shepard <jbms@....edu>,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	Kexec Mailing List <kexec@...ts.infradead.org>
Subject: Re: [RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump

Hi!

> > Seems like good enough for -mm to me.

(For the record, I do not think this is going to be
hibernation-replacement any time soon. But it is functionality useful
for other stuff -- dump memory and continue -- and yes it may be able
to do hibernation in the long term.

It really comes from the other side of reliability:

* swsusp is "if your kernel is perfectly healthy, it will work"

while this, coming from kdump is

* "if your kernel is not completely trashed, it should work"

...which is why can't use swsusp to do dump memory and continue -- you
want to do dumps on "slightly broken" systems. And yes, as a
sideeffect it may be able to do hibernation... why not, lets see how
it works out).

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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