linux-kernel - Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation

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Date:	Thu, 12 Jul 2007 12:05:08 -0700 (PDT)
From:	david@...g.hm
To:	Mark Lord <lkml@....ca>
cc:	"Huang, Ying" <ying.huang@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Jeremy Maitin-Shepard <jbms@....edu>,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH 0/2] Kexec jump: The first step to kexec	base	hibernation

On Thu, 12 Jul 2007, Mark Lord wrote:

> david@...g.hm wrote:
>>
>>  actually, I think that while you may be able to get away with only one
>>  kernel, you are probably better off with two. on the hibernate kernel you
>>  can choose many 'embedded' options that don't make sense for the normal
>>  kernel (no high mem, no SMP support, no SELinux, no network routing, not
>>  netfilter, use SLOB not SLAB/SLUB, etc). also keep in mind that each
>>  module that you load wastes apartial page of memory.
>
> No highmem?  No thanks.
>
> I really want hibernate to save stuff from above 1GB as well
> as the stuff below 1GB.

oops, good point. I was thinking that the hibernate kernel wouldn't need 
that much ram for it's own operation and forgetting that it needed to 
access everything the main system had.

David Lang
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