linux-kernel - Re: [PATCH 0/2 -mm] kexec based hibernation -v5

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Message-ID: <Pine.LNX.4.64.0710191852560.1538@asgard.lang.hm>
Date:	Fri, 19 Oct 2007 18:53:55 -0700 (PDT)
From:	david@...g.hm
To:	Phillip Susi <psusi@....rr.com>
cc:	"Huang, Ying" <ying.huang@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	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: [PATCH 0/2 -mm] kexec based hibernation -v5

On Fri, 19 Oct 2007, Phillip Susi wrote:

> Huang, Ying wrote:
>> 
>> 
>> The restore process with the patch set is as follow:
>> 
>> 1. Boot a kernel C (crash dump enabled), the memory area used by
>>    kernel C must be a subset of memory area used by kernel B.
>
> Why is a third kernel needed?  Why can't kernel B be used for this as well? 
> In fact, if kernel A has been compiled to be relocatable and crash dump 
> enabled, why wouldn't it suffice for all 3 instances?

you could use one kernel for all three, or you could use three different 
kernels, and three different sets of userspace if it's appropriate.

David Lang
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